Envy is the basis of democracy.

Envy, in fact, is one form of a vice, partly moral, partly intellectual, which consists in seeing things never in themselves, but only in their relations.

Even when the experts all agree, they may well be mistaken.

Fear is the parent of cruelty, and therefore it is no wonder if cruelty and religion go hand in hand.

My own view on religion is that of Lucretius. I regard it as a disease born of fear and as a source of untold misery to the human race.

Undoubtedly the desire for food has been and still is one of the main causes of political events.

The most essential characteristic of scientific technique is that it proceeds from experiment, not from tradition. The experimental habit of mind is a difficult one for most people to maintain; indeed, the science of one generation has already become the tradition of the next