If I give you a pfennig, you will be one pfennig richer and I'll be one pfennig poorer. But if I give you an idea, you will have a new idea, but I shall still have it too.

I am satisfied with the mystery of life's eternity and with a knowledge, a sense, of the marvelous structure of existence - as well as the humble attempt to understand even a tiny portion of the Reason that manifests itself in nature.

A woman is always Right. But sometimes confused or may be misinformed or rude or stubborn or senseless or unchangeable about her opinions or even down right stupid at times but NEVER wrong... She is always Right.

The hardest thing to understand in the world is the income tax.

My deep religiosity [...] found an abrupt ending at the age of twelve, through the reading of popular scientific books.

There is no logical way to the discovery of these elemental laws. There is only the way of intuition, which is helped by a feeling for the order lying behind the appearance.

But the personality that finally emerges is largely formed by the environment in which a man happens to find himself during his development, by the structure of the society in which he grows up, by the tradition of that society, and by its appraisal of particular types of behavior.