During the last century, and part of the one before, it was widely held that there was an unreconcilable conflict between knowledge and belief.

Human beings, vegetables, or cosmic dust, we all dance to a mysterious tune, intoned in the distance by an invisible piper.

The formulation of the problem is often more essential than its solution, which may be merely a matter of mathematical or experimental skill.

The trite objects of human efforts-possessions, superficial success, luxury-have always seemed contemptible to me.

Show me a satisfied man, and I'll show you a failure.

Physics is essentially an intuitive and concrete science. Mathematics is only a means for expressing the laws that govern phenomena.

From the standpoint of daily life, however, there is one thing we do know: that we are here for the sake of each other.