Women marry men hoping they will change. Men marry women hoping they will not.

I have come to know the mutability of all human relationships and have learned to insulate myself against both heat and cold so that a temperature balance is fairly well assured.

I am not an atheist. I do not know if I can define myself as a pantheist. The problem involved is too vast for our limited minds.

It is high time the ideal of success should be replaced with the ideal of service.

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

My life is a simple thing that would interest no one. It is a known fact that I was born, and that is all that is necessary.

A successful man is he who receives a great deal from his fellow men, usually incomparably more than corresponds to his service to them. The value of a man, however, should be seen in what he gives and not in what he is able to receive.