A termination of one's life is necessary in the scheme of things to provide a logical reason for unselfishness. . . . The fact that there is an end to one's life compels one to take an interest in things that will continue to live after one is dead.

God used beautiful mathematics in creating the world.

A book on the new physics, if not purely descriptive of experimental work, must essentially be mathematical.

A great deal of my work is just playing with equations and seeing what they give.

The measure of greatness in a scientific idea is the extent to which it stimulates thought and opens up new lines of research.

There is in my opinion a great similarity between the problems provided by the mysterious behavior of the atom and those provided by the present economic paradoxes confronting the world.

Living is worthwhile if one can contribute in some small way to this endless chain of progress.