Man can find meaning in life only through devoting himself to society.

God did not create evil. Just as darkness is the absence of light, evil is the absence of God.

The significant problems we have cannot be solved at the same level of thinking with which we created them.

The monotony and solitude of a quiet life stimulates the creative mind.

Information is not knowledge. The only source of knowledge is experience. You need experience to gain wisdom.

[Max Planck] was one of the finest people I have ever known... but he really didn't understand physics, [because] during the eclipse of 1919 he stayed up all night to see if it would confirm the bending of light by the gravitational field. If he had really understood [general relativity], he would have gone to bed the way I did

If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut