In formal logic, a contradiction is the signal of defeat, but in the evolution of real knowledge it marks the first step in progress toward a victory.

The deepest definition of youth is life as yet untouched by tragedy.

It is the business of the future to be dangerous; and it is among the merits of science that it equips the future for its duties.

Style, in its finest sense, is the last acquirement of the educated mind; it is also the most useful. It pervades the whole being.

It is more important that a proposition be interesting than that it be true.

Life is an offensive, directed against the repetitious mechanism of the Universe.

Apart from God every activity is merely a passing whiff of insignificance.