...everything in psychosocial evolution which can properly be called advance, or progress, or improvement, is due directionaly to the increase or improvement of knowledge.

It is essential for evolution to become the central core of any educational system, because it is evolution, in the broad sense, that links inorganic nature with life, and the stars with the earth, and matter with mind, and animals with man. Human history is a continuation of biological evolution in a different form.

The human race will be the cancer of the planet.

Evolution... is the most powerful and the most comprehensive idea that has ever arisen on Earth.

Darwinism removed the whole idea of God as the creator from the sphere of rational discussion.

We all know how the size of sums of money appears to vary in a remarkable way according as they are being paid in or paid out.

The sense of spiritual relief which comes from rejecting the idea of God as a supernatural being is enormous.