“Truth gains more even by the errors of one who, with due study and preparation, thinks for himself, than by the true opinions of those who only hold them because they do not suffer themselves to think.”

“Those only are happy who have their minds fixed on some object other than their own happiness; on the happiness of others, on the improvement of mankind, even on some art or pursuit, followed not as a means, but as itself an ideal end. Aiming thus at something else, they find happiness by the way.”

“Ask yourself whether you are happy, and you cease to be so.”

“It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied.”

“One person with a belief is a social power equal to ninety-nine who have only interests.”

“Human nature is not a machine to be built after a model, and set to do exactly the work prescribed for it, but a tree, which requires to grow and develop itself on all sides, according to the tendency of the inward forces which make it a living thing.”

“Our new Constitution is now established, and has an appearance that promises permanency; but in this world nothing can be said to be certain, except death and taxes.”

“When in doubt, tell the truth.”

“The old believe everything; the middle-aged suspect everything; the young know everything.”

“Men marry because they are tired; women because they are curious. Both are disappointed.”

“Oh, Diamond! Diamond! thou little knowest what mischief thou hast done!”

“I have no idea. People who boast about their IQ are losers.”