Geniuses are commonly believed to excel other men in their power of sustained attention . . . But it is their genius making them attentive, not their attention making geniuses of them.

Act as if what you do makes a difference. It does.

General scepticism is the live mental attitude of refusing to conclude. It is a permanent torpor of the will, renewing itself in detail towards each successive thesis that offers, and you can no more kill it off by logic than you can kill off obstinacy or practical joking.

The sway of alcohol over mankind is unquestionably due to its power to stimulate the mystical faculties of human nature, usually crushed to earth by the cold facts and dry criticisms of the sober hour.

Experience, as we know, has a way of boiling over, and making us correct our present formulas.

Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.

There is but one cause of human failure. And that is man's lack of faith in his true Self.