Common sense consists of those layers of prejudice laid down before the age of 18.

Politics is more difficult than physics.

Germany had the misfortune of becoming poisoned, first because of plenty, and then because of want.

The greater the doubt, the greater the awakening

Thinking is to man what flying is to birds. Don’t follow the example of a chicken when you could be a lark.

When forced to summarize the general theory of relativity in one sentence: Time and space and gravitation have no separate existence from matter.

If you want your children to be smart, tell them stories. If you want them to be really smart, tell them more stories. If you want your children to be brilliant, tell them even more stories.