Your own mind is a sacred enclosure into which nothing harmful can enter except by your permission.

You can only acquire really useful general ideas by first acquiring particular ideas . . . You cannot make bricks without straw.

Which of us is not saying to himself which of us has not been saying to himself all his life: " I shall alter that when I have a little more time"? We never shall have any more time. We have, and we have always had, all the time there is.

All wrong doing is done in the sincere belief that it is the best thing to do.

Happiness includes chiefly the idea of satisfaction after full honest effort. No one can possibly be satisfied and no one can be happy who feels that in some paramount affairs he failed to take up the challenge of life.

Nearly all bookish people are snobs, and especially the more enlightened among them. They are apt to assume that if a writer has immense circulation, if he is enjoyed by plain persons, and if he can fill several theatres at once, he cannont possibly be worth reading and merits only indifference and disdain.

You can turn over a new leaf every hour
if you choose.