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A Commonplace Book

Interpretive essays on quotes worth keeping — a commonplace book, read and re-read.

Character & Self-Mastery

Jefferson's Decalogue of Canons

A Decalogue of Canons for observation in practical life.

  1. Never put off till tomorrow what you can do to-day.
  2. Never trouble another for what you can do yourself.
  3. Never spend your money before you have it.
  4. Never buy what you do not want, because it is cheap; it will be dear to you.
  5. Pride costs us more than hunger, thirst and cold.
  6. We never repent of having eaten too little.
  7. Nothing is troublesome that we do willingly.
  8. How much pain have cost us the evils which have never happened!
  9. Take things always by their smooth handle.
  10. When angry, count ten, before you speak; if very angry, an hundred.

— Thomas Jefferson, enclosed with a letter to Thomas Jefferson Smith, February 21, 1825

Analytical Interpretation

Background and Context

An old man is asked to write something to a baby. The child has been named after him by a friend, the friend would like a keepsake with some use in it, and the man is eighty-one and has fewer than eighteen months to live.

What he sends is three things, and the division between them is the most useful fact about the document. There is a covering letter, which opens by observing that it will reach the boy as a letter from the dead, and which does name virtues, plainly and in the imperative — adore God, cherish your parents, love your neighbour as yourself and your country more than yourself, be just, be true. There is a poem, headed as the portrait of a good man and offered for imitation. And then, separately, under its own heading, there are ten numbered sentences that do none of that.

He had been working on those ten for somewhere between fourteen and twenty years by then, in more than one version, for more than one young person, adding and dropping and rewording. This is a document that had been sifted. It is also, at that length and on that occasion, the last practical counsel he had to give — not the moral part, which travelled in the letter and the poem, but the residue he judged portable enough to hand to someone who would have to use it without him.

Interpretation

Ten items, and not one of them names a virtue.

Ordinarily that would be a thin observation, since plenty of practical lists are silent about goodness for no reason worth discussing. What makes it evidence here is that Jefferson had just finished naming virtues, in the same mailing, an inch further up the page — be just, be true, love your neighbour — and then stopped, drew a heading, and began a different document under it. Whatever the canons are, they were composed as the thing that goes after the moral instruction, by a man who had demonstrably not run out of moral instruction. Inside their own boundary there is no honesty, no justice, no courage, no generosity, no piety, and no duty; there are ten sentences about money, food, temper, and time.

The list has three movements, and they are doing three different jobs.

The first four items are prohibitions, all of them opening on the same word. Never put off, never trouble another, never spend ahead, never buy what you do not want. Two concern effort and two concern money, and each names one specific, extremely common, entirely recognizable error. Only the fourth bothers to explain itself — it will be dear to you — and the explanation it gives is mechanical: the cheap thing costs you later, in a currency you were not tracking at purchase.

Items five through eight stop instructing altogether. They are observations. Pride costs us more than hunger, thirst and cold asserts a comparison of magnitudes. We never repent of having eaten too little claims that a particular regret is reliably absent. Nothing is troublesome that we do willingly locates difficulty somewhere unexpected — in the unwillingness rather than in the work, which if true means that most of what people describe as hard is a report about their own consent. And How much pain have cost us the evils which have never happened is an exclamation about anticipatory suffering, aimed at the largest single category of distress most people carry. Four sentences in a row containing no imperative at all. They tell a child how minds behave.

The last two are techniques, and they share a structure. Take things always by their smooth handle says that a situation, like a pot, offers more than one aspect to grasp, and that which one you take is up to you. When angry, count ten, before you speak; if very angry, an hundred is a procedure with a dial on it. Neither of these is a virtue and neither is even advice about character. Both insert an interval — a gap between what has happened and what you do about it — and both are indifferent to what kind of person is using them.

Forbid four errors, describe four mechanisms, supply two procedures. Then stop.

The absence of any named good is the document's actual claim, and it is a strong one. It treats character as a problem of avoiding a small set of well-attested failures instead of pursuing an ideal, and the reasoning behind that is visible in the items themselves. Look at what the four prohibitions have in common: each names an act that is pleasant at the moment of commission and costly later, and each is therefore a mistake a person makes while feeling perfectly reasonable. Deferral, imposition, spending ahead, buying cheap — nobody does these while thinking they are doing wrong. That is a specifiable class, and it is small, because the number of ways a sensible person can be talked into a bad trade by his own comfort turns out to be short and to repeat across lives.

Coming out well has no such structure. It varies by the person, it is only legible in retrospect, and any attempt to compress it into ten numbered lines produces something that sounds admirable and instructs nobody — which is exactly what the covering letter's virtues do, and precisely why they are in the covering letter and not here.

The cost of that choice is real and the list does not acknowledge it. Everything here can be fully satisfied by a man who has done nothing whatever — who never wasted a day, never asked for help, never carried debt, kept his temper, and lived a life of no consequence to anyone. The canons describe a floor with great precision and decline to say anything about what is built on it.

Current Relevance

Almost every institution that governs conduct at scale has ended up writing Jefferson's kind of document, and most of them did not intend to.

A professional code of ethics, a corporate code of conduct, an academic integrity policy, a medical licensing board's standards: each rests its enforceable weight on a list of prohibited acts, arrived at independently and under pressure, because a body that has to sanction somebody who disagrees with the sanction needs a clause it can point at.

What the canons illuminate is less the drafting problem than what an enumeration does to the person living under it, and here Jefferson's boy and a first-year associate are in the same position. A list of specified failures is a map of consequences, and people read maps of consequences the way water reads ground. If the only thing that can be held against you is a listed breach, then the skill the document actually teaches is fluency in the list — where its edges are, what falls outside it, which conduct is unlovely and unlisted. That competence is real, it is learnable, and it is not integrity. It is closer to a working knowledge of one's own exposure, and it is available in equal measure to the scrupulous and the predatory, which is why a well-drafted code so reliably fails against exactly the person it was drafted after.

Jefferson's list has the same property and is unusually honest about it, because the ten are so plainly a floor that nobody could mistake them for a portrait. Compliance regimes obscure this by bolting on a statement of values, which nothing then enforces — and the effect of the bolted-on half is worse than absence, since a reader who notices that one half carries consequences and the other does not has been taught something quite specific about the institution's real preferences.

Which leaves the question the canons pose still open, in the shape it had in 1825. An enumeration of failures is the only part of a conduct standard that functions, it teaches the governed to become expert in their own boundaries, and it is demonstrably not what anybody wanted to produce. Jefferson evidently thought a boy who kept these ten would come out all right. He had also, in the same mailing, taken the trouble to send the boy a poem about what a good man looks like.

Impact and Legacy

The list had a working life. Through the middle decades of the nineteenth century it was reprinted in American farm journals and general-interest papers as practical instruction, sitting alongside crop advice, and by 1878 a Chicago newspaper thought it familiar enough to run a parody of — which is a better index of circulation than any reprint count, since a joke only lands if the audience already has the original.

Its more durable legacy belongs to the form it sits in. The canons are one instance of a genre with a long history: the set of rules an old man hands a young one at the moment the young one is being launched — Polonius to Laertes, Chesterfield to his son, the letter to a godson opened on a later birthday. What Jefferson's contributes to that form is its refusal to say anything elevated, and the refusal is unusual enough in the genre to be its signature.

That signature has also proved to be the part of the list a later hand will reach for. At least one line of transmission — the one that reached this collection — keeps Jefferson's first six items and replaces his last four with four sentences from a twentieth-century inspirational creed. What comes out is the descriptive middle and one of the two techniques; what goes in is four aspirational imperatives about how to be. It is worth being precise about the scale of this. The genuine ten remain the standard published form, and the hybrid appears to be a minor, undocumented variant with a small readership. What makes it interesting is not its reach but its direction. Somebody holding Jefferson's list judged the back third of it insufficient and supplied exactly the register he had declined to write in, producing a document that tells a reader how to feel about his own life — which the original, at no point and by evident design, does.

Contrasting Views or Controversies

The most serious charge against the canons is that a purely avoidant programme produces avoidant people. Nothing here asks the reader to attempt anything. Aristotle's objection would be that virtue is an activity, that the courageous man is identified by what he does under fear and never by a list of things he refrained from, and that a training regime consisting entirely of prohibitions will produce someone careful, solvent, punctual, and unremarkable.

Before that charge can land, though, it has to get past a prior one that would dissolve it — the suspicion that there is no programme here to object to. Most of these maxims were not Jefferson's composition. He collected and arranged them, and a proverb stock is short of abstract nouns by nature, since proverbs deal in concrete things: money, food, tempers, handles. On that account the architecture described above is simply what anyone gets who assembles a list from that material, the absence of virtues is a property of the genre, and Aristotle would be complaining about proverbs in general rather than about anything Jefferson did.

What settles it is the traffic in and out of the list. Three items left the twelve at one point or another, and they did not leave together. Take care of your cents: Dollars will take care of themselves went in 1817 and never returned. Nothing is troublesome that one does willingly also went in 1817 — and then came back in 1825, restored to a list it had already been cut from. Think as you please, and so let others, and you will have no disputes survived the first cut and was removed only at the last.

Every one of those three is as concrete as anything that stayed; the first is the most purely practical sentence in the whole set. So whatever Jefferson was selecting against across those years, it was not abstraction — and a man who takes a sentence out, leaves it out for eight years, and then puts it back is not letting a proverb stock settle. He is deciding, repeatedly, and changing his mind. The surviving ten are a choice, and that hands Aristotle his objection back with its teeth in: the silence about what the floor is for was made and remade by someone who kept reopening the question, and the list still has no answer to him. A second objection is to item two, and it sharpens with use. Never trouble another for what you can do yourself, taken as written, is a rule against asking for help. As counsel to a particular boy of a particular class, with resources and prospects, it reads as self-reliance and is probably good for him. Generalised, it corrodes the thing that actually carries people through difficulty, which is a standing willingness to be a nuisance to somebody and to have somebody be a nuisance to you. A community in which everyone observed item two strictly would be composed of people who all coped alone and none of whom knew each other.

There is also a plain problem with item six. We never repent of having eaten too little is false, conspicuously so, for anyone who has ever eaten too little without choosing to. The trouble is the we. An observation that holds only where eating lightly is elective has been stated as a fact about everybody, and the universal register is doing the work of hiding the condition the claim depends on — which is exactly the failure mode of the descriptive middle generally, since a description offered in that register cannot be checked by the reader against a situation it was never true of.

Practical Application

  • For an individual writing rules for themselves: sort the draft into Jefferson's three kinds before keeping any of it, because the three are used differently and mixing them is what makes a personal code quietly stop working. Prohibitions are commitments: you either kept them this week or you did not, and the record is checkable. Observations are predictions about how you actually behave, and the right operation on them is testing — hold how much pain have cost us the evils which have never happened against a list of the things you dreaded last year and see what the hit rate was. Techniques are procedures, and they either fit the shape of your day or they do not. Most self-written codes fail at the middle kind, because a person resolves to obey a description, finds there is nothing to obey, and concludes the whole list was sentimental.
  • For a parent, teacher, or anyone asked for advice: establish the deadline before you answer, because it silently determines the form. Jefferson's canons were commissioned for a reader who would not be able to use them for many years and whom he would never meet, and a request with that horizon has one honest answer: general, portable, and short. A request with a horizon of Tuesday has a different one, and the test for which you are facing is simple — ask whether the person can come back and tell you it did not work. If they can, you are in a conversation and should behave like it. If they cannot, everything you write has to stand up unattended, and the material that does is much thinner than most people expect. Reaching for the durable form when the person in front of you wanted the other one is the commonest way advice goes wrong, and it reads to the recipient as a door closing.
  • For an organisation drafting a code of conduct: enumerate the failures, because in practice that will be the only part anyone can enforce, and then state plainly in the document that the enumeration is a floor and name what the standard above it is. The failure mode is not having an aspirational section; it is having one that is never referenced in any decision, which teaches every reader that the prohibitions are the real document and the rest is decoration. If nothing in your promotion, hiring, or review process ever turns on the positive half, it is not part of the code.
  • For a reader meeting a list of maxims in circulation: check the back half against a source. The opening items are what people remember and repeat, and the tail is where material gets quietly swapped, because an ending that sounds like an ending draws no attention to itself. That is precisely what happened to this list.

Background on the Author

Thomas Jefferson kept commonplace books from adolescence — blank volumes into which he copied passages worth having, a standard discipline of eighteenth-century education that most people abandoned after school and that he did not. He filled one with law, another with literature and philosophy, and went on collecting other people's sentences for decades. The habit produces a specific competence, and the competence is curatorial: the practised judgment of a man who has spent his life deciding, thousands of times over, which formulations are worth the ink and which are merely agreeable.

The canons are the output of that competence. Most of the ten were not his invention, and the arrangement was; what he supplied was the selection, made repeatedly across at least three versions sent to three different young people over fourteen to twenty years. The count was cut once, a dozen to ten, and then held; but the membership kept moving under it, with one item dropped in 1817 and restored in 1825 and another surviving that first cut only to be removed at the last. The wording went on tightening through every pass.

Which locates the document's authority in the length and seriousness of the comparison. Each surviving sentence had been held up against alternatives for well over a decade by someone unusually practised at that act, and had gone on surviving. Jefferson never offered the canons as original and never offered them as a philosophy. They are a curator's testimony, and reading them as one accounts for the feature that otherwise looks like a gap — a curator exhibits, and has no occasion to argue.


Perspectives

Addressed to a Stranger

A man he knew wrote to him and said: I've named my son after you. Would you write him something?

The son was an infant. Jefferson was eighty-one. There was no version of the future in which those two people were going to have a conversation, and both of the adults involved understood that perfectly well. So what he sat down to was a strange assignment — not "what do I want to tell this child," because he didn't know the child, but "what will still be worth having, to a person I can't picture, in a year I won't see."

I want to insist on how different that is from giving advice.

Advice is a conversation. You say a thing, and the person's face does something, and you adjust — you say well, not always, or I mean in your situation, or you drop it entirely because you can see it landed wrong. Half the work is being done by the room, and you can lean on that, and everyone does.

Jefferson had no room. He had a piece of paper going to somebody who would not be able to read it for years, and would open it alone, in a life nobody in 1825 could describe. Whatever he put down would have to hold up with no one there to qualify it, and that imposes a brutal filter — every sentence you'd normally soften with a look, or with a but you know your own situation, has to survive without the softening or else come out.

What survives that filter is much smaller than what you'd have said out loud. Which is why I think the list is short and dry and about money and temper, and why I don't read that as coldness.

And he does the grand thing first, which is what makes the rest of it deliberate. The letter blesses the boy — be just, be true, love your neighbour — and there's a poem about what a good man looks like, and if he had stopped there nobody would have thought anything was missing. Then he starts a new page and hands over: don't put things off, don't spend money you haven't got, count to ten. The kind of thing you'd say at a station with ninety seconds left and no idea when you'd see somebody again.

I find the sequence genuinely moving. He said the large things, and then he sat there and thought about what else would still be useful in twenty years to a person he couldn't picture, and what he came up with was small and about money and temper. When you don't know who somebody is going to turn out to be, the honest things you can leave them are the ones that don't depend on knowing.

Sometime after 1922, which is the earliest anyone can document the other man's lines existing, somebody read this list, probably with real affection for it, and cut the back four, and put in something warmer. Press on to greater achievements. Wear a cheerful countenance. It doesn't seem to have travelled far; the real ten are still the ones in the anthologies. But it travelled far enough to reach here.

I understand the impulse entirely. It's tenderness with poor judgment, which is nearly always what an unauthorized edit turns out to be. Somebody looked at ten flat sentences going to a baby and felt the lack of a blessing in them — not knowing, presumably, that the blessing had been sent, on its own page, and had simply not been copied along with the list.

And the boy's name was Thomas Jefferson Smith. What he was actually sent was a letter, a poem, and ten sentences, from a man who died before he was old enough to read any of it. Nobody asked him afterward which version he'd have wanted. He got the flat one, in the mail, addressed to him by name, and there is nothing in the record to suggest anything else ever passed between them.


Provenance — researched 2026-09-05
  • Attributed to: Thomas Jefferson (1743–1826), correctly for the ten canons as filed here — with the standing qualification, recorded by the editors of his papers, that most of the individual maxims were not original to him. What is his is the selection and the arrangement.
  • Source: An enclosure headed "A Decalogue of Canons for observation in practical life," sent with a letter to Thomas Jefferson Smith, the infant son of Jefferson's friend John Spear Smith, who had named the boy for him and asked Jefferson to address something to him. The mailing had three parts: the covering letter, which opens "This letter will, to you be as one from the dead, the writer will be in the grave before you can weigh it's counsels" and which names virtues directly ("adore God. reverence and cherish your parents. love your neighbor as yourself, and your country more than yourself. be just. be true."); a second enclosure headed "The portrait of a good man by the most sublime of Poets, for your imitation," being a metrical paraphrase of Psalm 15 and not a likeness of Jefferson, a heading easily misread; and the Decalogue itself. The Library of Congress catalogues the item accordingly, as the letter "with Poem and Decalogue." The document has two earlier states, both genuine: a twelve-item list headed "a dozen Canons of conduct in life," sent to his granddaughter Cornelia Jefferson Randolph (dated ca. 1805–1810 by Monticello's Jefferson Quotes & Family Letters, and 1811 by Monticello's own teaching handout — the two disagree and the point is left unresolved here rather than guessed at); and a ten-item version enclosed with a letter to Paul A. Clay on 12 July 1817, in whose cover letter Jefferson describes the list as canons that "may merit a shelf after the one occupied by the Decalogue of first authority," confirming that he used Decalogue to mean ten and meant the comparison to the biblical one. The membership of the list is not stable across the two ten-item states, and the difference matters. Against the twelve-item numbering, Monticello's editorial annotation records that the 1817 list omits items 5 and 8, while the 1825 list omits items 5 and 11. That is: "Take care of your cents: Dollars will take care of themselves" (5) left in 1817 and never returned; "Nothing is troublesome that one does willingly" (8) left in 1817 and was restored in 1825, where it stands as item 7; and "Think as you please, and so let others, and you will have no disputes" (11) survived the 1817 cut and was removed only in 1825. The count was reduced once; the composition was revised twice.
  • Date & context: 21 February 1825, from Monticello. Jefferson was eighty-one and died on 4 July 1826, sixteen months later. The interval between the earliest state of the list and this one cannot be fixed more closely than fourteen to twenty years, because the Cornelia Randolph manuscript is undated and the two Monticello datings disagree; prose in this file uses that range rather than the favourable end of it.
  • Verified wording: The ten canons as filed above match the 1825 enclosure as transcribed at Founders Online, including Jefferson's own heading, his hyphenated "to-day," his semicolons, and "an hundred" in the tenth. The 1817 version to Paul Clay carries ten items in a different order and with looser wording ("When at table, remember that we never repent of having eaten or drunk too little"), but they are not the same ten — see the membership note above. The 1825 text is the settled form and is what is filed.
  • Corrected wording: The staged text was a conflation of two documents by two authors and has been replaced in the body with Jefferson's own ten. Its first six items were Jefferson's, with one silent alteration — the sixth had been shifted from his present tense, "We never repent of having eaten too little," to "We have never repented of having eaten too little." Its last four items were not Jefferson's at all. They are lines seven through ten of the ten-line composition known as the Optimist Creed, or "Promise Yourself," attributed to the New Thought writer Christian D. Larson (1874–1954): "To forget the mistakes of the past and press on to the greater achievements of the future / To wear a cheerful countenance at all times and give every living creature you meet a smile / To give so much time to the improvement of yourself that you have no time to criticize others / To be too large for worry, too noble for anger, too strong for fear and too happy to permit the presence of trouble." The staged version reproduced the first three of these verbatim less the leading "To," and abridged the fourth's closing clause to "too happy to permit troubles" — a wording that appears not to occur outside circulations of this same hybrid. The four Jefferson canons the substitution displaced are his items seven through ten, restored above.
  • Status: Authentic as filed and corrected. The conflation has been resolved in place per the corpus's quote-fidelity convention, so the file carries no authenticity parenthetical: what stands in the body is Jefferson's own document, correctly attributed. Two research findings are recorded rather than smoothed over. First, the standard claim that Larson's "Promise Yourself" was published in his Your Forces and How to Use Them (1912) is correct, and a finding recorded here on 2026-09-05 to the contrary is withdrawn. That check searched the 1912 first edition and reported that none of the creed's distinctive phrases occurred in it. They are in the book. The composition stands in the front matter, in a twelve-line form, between the closing line of the Foreword and the Chapter I heading — unpaginated, set off by a decorative rule, and out of reach of a search confined to the numbered chapters. Re-verified 2026-09-06 by reading the passage in place in the raw text of two independent scans of the 1912 edition. Optimist International's creed, adopted 1922, is Larson's first ten lines; its text is cited below as the authority for the current ten-line wording, and the 1912 book is cited as the original venue. Full detail is in The Optimist Creed by Christian D. Larson, in 04 - Character & Self-Mastery. Second, no fact-checking body appears to have documented this specific Jefferson-plus-Larson hybrid. Monticello's spurious-quotations collection, Snopes's Jefferson coverage, and Quote Investigator were all checked and none addresses it; the negatives are recorded so the search is not repeated. The likeliest account, offered as inference and not as finding, is that someone truncated the genuine decalogue after its sixth item and completed it from a half-remembered creed.
  • Citation (Chicago):
    • Jefferson, Thomas. "From Thomas Jefferson to Thomas Jefferson Smith, 21 February 1825," with enclosure, "A Decalogue of Canons for observation in practical life." Founders Online, National Archives. Accessed September 5, 2026. https://founders.archives.gov/documents/Jefferson/98-01-02-4987. Early Access transcription; final volume and page in The Papers of Thomas Jefferson: Retirement Series, edited by J. Jefferson Looney (Princeton, NJ: Princeton University Press), not yet assigned.
    • Jefferson, Thomas. "From Thomas Jefferson to Paul A. Clay, 12 July 1817," with enclosure. In The Papers of Thomas Jefferson: Retirement Series, vol. 11, edited by J. Jefferson Looney. Princeton, NJ: Princeton University Press. Founders Online, National Archives. Accessed September 5, 2026. https://founders.archives.gov/documents/Jefferson/03-11-02-0432. The 1817 ten-item state, with the editors' note that most of the maxims were not original to Jefferson though the arrangement was.
    • "A Dozen Canons of Conduct in Life." Jefferson Quotes & Family Letters. Thomas Jefferson Foundation, Monticello. Accessed September 5, 2026. https://tjrs.monticello.org/letter/216. The twelve-item state sent to Cornelia Jefferson Randolph.
    • Optimist International. "The Optimist Creed: Promise Yourself." Chicago: Optimist International. Accessed September 5, 2026. https://www.optimist.org/documents/creed_poster.pdf. Authoritative current text of the composition supplying the four interpolated lines.
    • Larson, Christian D. Your Forces and How to Use Them. Los Angeles: The New Literature Publishing Company, 1912. https://archive.org/details/yourforceshowtou00lars. The original venue of "Promise Yourself," which appears in the book's front matter in a twelve-line form; the four lines interpolated into the staged decalogue are its seventh through tenth.

Provenance researched 2026-09-05.