Of all the grief's that harass the distressed; sure the most bitter is a scornful jest.

Human experience, which is constantly contradicting theory, is the great test of truth. A system, built upon the discoveries of a great many minds, is always of more strength, than what is produced by the mere workings of any one mind, which, of itself, can do very little. There is not so poor a book in the world that would not be a prodigious effort were it wrought out entirely by a single mind, without the aid of prior investigators.

To preserve health is a moral and religious duty: for health is the basis of all social virtues; and we can be useful no longer than while we are well.

It is the condition of our present state to see more than we can attain; the exactest vigilance and caution can never maintain a single day of unmingled innocence.

Judgment is forced upon us by experience

I have all my life long been lying in bed till noon; yet I tell all young men, and tell them with great sincerity, that nobody who does not rise early will ever do any good.

Being reproached for giving to an unworthy person, Aristotle said, I did not give it to the man, but to humanity.