“The difference between a moral man and a man of honor is that the latter regrets a discreditable act, even when it has worked and he has not been caught.”

Letter to Abigail Adams (29 October 1775), published Letters of John Adams, Addressed to His Wife, Vol. 1 (1841), ed. Charles Francis Adams, p. 72
1770s
Context: Human nature with all its infirmities and depravation is still capable of great things. It is capable of attaining to degrees of wisdom and goodness, which we have reason to believe, appear as respectable in the estimation of superior intelligences. Education makes a greater difference between man and man, than nature has made between man and brute. The virtues and powers to which men may be trained, by early education and constant discipline, are truly sublime and astonishing. Newton and Locke are examples of the deep sagacity which may be acquired by long habits of thinking and study.

Source: The Perpetual Calendar of Inspiration

Source: Station Eleven (2014), Chapter 53 (p. 327)

Source: The Doctrine of the Mean

Ibid., p. 9
The Education of the Stoic

Source: The Doctrine of the Mean, p. 126

The Fantastic Imagination (1893)
Context: "But a man may then imagine in your work what he pleases, what you never meant!"
 Not what he pleases, but what he can. If he be not a true man, he will draw evil out of the best; we need not mind how he treats any work of art! If he be a true man, he will imagine true things: what matter whether I meant them or not? They are there none the less that I cannot claim putting them there! One difference between God's work and man's is, that, while God's work cannot mean more than he meant, man's must mean more than he meant. For in everything that God has made, there is layer upon layer of ascending significance; also he expresses the same thought in higher and higher kinds of that thought: it is God's things, his embodied thoughts, which alone a man has to use, modified and adapted to his own purposes, for the expression of his thoughts; therefore he cannot help his words and figures falling into such combinations in the mind of another as he had himself not foreseen, so many are the thoughts allied to every other thought, so many are the relations involved in every figure, so many the facts hinted in every symbol. A man may well himself discover truth in what he wrote; for he was dealing all the time with things that came from thoughts beyond his own.

Letter to his Children (1965)