What a teacher needs to know about psychology "might almost be written on the palm of one's hand."

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

A good hypothesis in science must have other properties than those of the phenomenon it is immediately invoked to explain, otherwise it is not prolific enough.

Effort is a measure of a Man.

Smitten as we are with the vision of social righteousness, a God indifferent to everything but adulation, and full of partiality for his individual favorites, lacks an essential element of largeness.

To kill time is not murder, it's suicide.

Marvelous as may be the power of my dog to understand my moods, deathless as his affection and fidelity, his mental state is as unsolved a mystery to me as it was to my remotest ancestor.