It is best, it seems to me, to separate one's inner striving from one's trade as far as possible. It is not good when one's daily break is tied to God's special blessing.

Student is not a container you have to fill but a torch you have to light up.

It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing - a somewhat unfamiliar conception for the average mind. Furthermore, the equation E = mc², in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa.

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

One strength of the communist system of the East is that it has some of the character of a religion and inspires the emotions of a religion.

Concerning matter, we have been all wrong. What we have called matter is energy, whose vibration has been so lowered as to be perceptible to the senses. There is no matter.

Long live impudence. It was my guardian angel in this world.