You cannot solve current problems with current thinking. Current problems are the result of current thinking.

In the teaching of geography and history a sympathetic understanding (should) be fostered for the characteristics of the different peoples of the world, especially for those who we are in the habit of describing as "primitive.

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.

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

The creative scientist studies nature with the rapt gaze of the lover, and is guided as often by aesthetics as by rational considerations in guessing how nature works.

If the bees disappear, man would have only four years of life left.

How insidious Nature is when one is trying to get at it experimentally.