In my relativity theory I set up a clock at every point in space, but in reality I find it difficult to provide even one clock in my room.

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

The individual must not merely wait and criticize, he must defend the cause the best he can. The fate of the world will be such as the world deserves.

It is strange to be known so universally and yet to be so lonely.

Each makes this cosmos and its construction the pivot of his emotional life, in order to find in this way peace and security which he can not find in the narrow whirlpool of personal experience.

The aim (of education) must be the training of independently acting and thinking individuals who, however, see in the service to the community their highest life problem.

It would be a sad situation if the bag was better than the meat wrapped in it.