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.

Quantity of material production can only be a means to a further end, not an end in itself.

Sooner or later, false thinking brings wrong conduct.

Some day no one will have to work more than two days a week... The human being can consume so much and no more. When we reach the point when the world produces all the goods that it needs in two days, as it inevitably will, we must curtail our production of goods and turn our attention to the great problem of what to do with our new leisure.

Words are tools which automatically carve concepts out of experience.

God is one among several hypotheses to account for the phenomena of human destiny, and it is now proving to be an inadequate hypothesis. To a great many people, including myself, this realization is a great relief, both intellectually and morally. It frees us to explore the real phenomena for which the God hypothesis seeks to account, to define them more accurately, and to work for a more satisfying set of concepts.

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