...evolution is the gradual development and stratification of progressive series of wholes, stretching from the inorganic beginnings to the highest level of spiritual creation.

To me the greatest thing that has happened on this earth of ours is the rise of the human race to the vision of God. That story of the human rise to what I call the vision of God is the story which is told in the Bible.

Democracy, with its promise of international peace, has been no better guarantee against war than the old dynastic rule of kings.

When I look at history, I am a pessimist...but when I look at prehistory, I am an optimist.

...evolution is the gradual development and stratification of progressive series of wholes, stretching from the inorganic beginnings to the highest level of spiritual creation.

The intimate rapport with nature is one of the most precious things in life. Nature is indeed very close to us; sometimes closer than hands and feet, of which in truth she is but the extension. The emotional appeal of nature is tremendous, sometimes almost more than one can bear.

A man is not defeated by his opponents but by himself