The minute a man ceases to grow, no matter what his years, that minute he begins to be old.

He who refuses to embrace a unique opportunity loses the prize as surely as if he had failed.

Need and struggle are what excite and inspire us; our hour of triumph is what brings the void.

Essential truth, the truth of the intellectualists, the truth with no one thinking it, is like the coat that fits tho no one has ever tried it on, like the music that no ear has listened to. It is less real, not more real, than the verified article; and to attribute a superior degree of glory to it seems little more than a piece of perverse abstraction-worship.

Truth is one species of good, and not, as is usually supposed, a category distinct from good, and co-ordinate with it

The greatest revolution of our generation is the discovery that human beings, by changing the inner attitudes of their minds, can change the outer aspects of their lives.

The greatest empiricists among us are only empiricists on reflection: when left to their instincts, they dogmatize like infallible popes.