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

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 zestful but scientific exploration of possibilities and of the techniques for realizing them will make our hopes rational, and will set our ideals within the framework of reality, by showing how much of them are indeed realizable.

It is easier to believe that there was nothing before there was something than that there was something before there was nothing.

This earth is one of the rare spots in the cosmos where mind has flowered. Man is a product of nearly three billion years of evolution, in whose person the evolutionary process has at last become conscious of itself and its possibilities. Whether he likes it or not, he is responsible for the whole further evolution of our planet.

The popular and scientific views of "race" no longer coincide. The word "race," as applied scientifically to human groupings, has lost any sharpness of meaning. To-day it is hardly definable in scientific terms, except as an abstract concept which may, under certain conditions, very different from those now prevalent, have been realized approximately in the past and might, under certain other but equally different conditions, be realized in the distant future.

How unfortunate for mankind that the Lord is reported by Holy Writ as having said 'Vengeance is mine!'