Keep fighting until the last buzzer sounds.

Since our inner experiences consist of reproductions, and combinations of sensory impressions, the concept of a soul without a body seem to me to be empty and devoid of meaning.

Formerly, people thought that if matter disappeared from the universe, space and time would remain. Relativity declares that space and time would disappear with matter.

There is, however, a somber point in the social outlook of Americans. Their sense of equality and human dignity is mainly limited to people of white skin.... The more I feel like an American, the more the situation pains me.

Don't do anything that goes against your conscience, even if your country says so.

The world is so full of possibilities that dogmatism is simply indecent.

The most beautiful experience in the world is the experience of the mysterious.