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.

Nothing truly valuable can be achieved except by the unselfish cooperation of many individuals.

Nature hides her secrets because of her essential loftiness, but not by means of ruse.

The woman who follows the crowd will usually go no further than the crowd. The woman who walks alone is likely to find herself in places no one has ever been before.

The most evident difference springs from the important part which is played in man by a relatively strong power of imagination and by the capacity to think, aided as it is by language and other symbolically devices.

A forced faithfulness is a bitter fruit for all concerned.

The physicist's greatest tool is his wastebasket.