Warfare cannot be humanized.

The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle.

If the facts don't fit the theory, change the facts.

Time has no independent existence apart from the order of events by which we measure it.

It is important to foster individuality, for only the individual can produce the new ideas.

You think you have troubles with mathematics . . . I assure you mine are still bigger.

A man must learn to understand the motives of human beings, their illusions, and their sufferings.