There is but one unconditional commandment ... to bring about the very largest total universe of good which we can see.

Habit is the enormous flywheel of society, its most precious conservative agent. There is no more miserable human being than one in whom nothing is habitual but indecision. Full half the time of such a man goes to the deciding, or regretting, of matters which ought to be so ingrained in him as practically not to exist for his consciousness at all.

Serious development of the personality begins at the closet door.

a man does not cry because he is sad, he is sad because he cries

To be a real philosopher all that is necessary is to hate some one else's type of thinking.

Pretend what we may, the whole man within us is at work when we form our philosophical opinions. Intellect, will, taste, and passion co-operate just as they do in practical affairs; and lucky it is if the passion be not something as petty as a love of personal conquest over the philosopher across the way.

True ideas are those that we can assimilate, validate, corroborate, and verify. False ideas are those that we cannot. That is the practical difference it makes to us to have true ideas; that therefore is the meaning of truth, for it is all that truth is known as.