Only one who devotes himself to a cause with his whole strength and soul can be a true master. For this reason mastery demands all of a person.

Never underestimate your own ignorance.

We all try to escape pain and death, while we seek what is pleasant.

If something is in me which can be called religious then it is the unbounded admiration for the structure of the world so far as our science can reveal it.

You cannot solve current problems with current thinking. Current problems are the result of current thinking.

If people are good because they fear punishment, and hope for reward, then we are a sorry lot indeed.

A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended its area of applicability.