There can be no knowledge without emotion. We may be aware of a truth, yet until we have felt its force, it is not ours. To the cognition of the brain must be added the experience of the soul.

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.

Worry is evidence of an ill-controlled brain; it is merely a stupid waste of time in unpleasantness. If men and women practiced mental calisthenics as they do physical calisthenics, they would purge their brains of this foolishness.

The gain in self-confidence of having accomplished a tiresome labour is immense.

We shall never have more time. We have, and always had, all the time there is. No object is served in waiting until next week or even until tomorrow. Keep going... Concentrate on something useful.

It is only people of small stature who have to stand on their dignity.

As a rule people don't collect books; they let books collect themselves.