Evil, by definition, is that which endangers the good, and the good is that which we perceive as a value.

More than any other product of human scientific culture scientific knowledge is the collective property of all mankind.

Most of the vices and mortal sins condemned today correspond to inclinations that were purely adaptive or at least harmless in primitive man

The human mind, in taking us down the path of technocracy, has become the adversary of life itself and collaterally the adversary of the human soul.

All scientific knowledge to which man owes his role as master of the world arose from playful activities.

We had better dispense with the personification of evil, because it leads, all too easily, to the most dangerous kind of war: religious war.

Every man gets a narrower and narrower field of knowledge in which he must be an expert in order to compete with other people. The specialist knows more and more about less and less and finally knows everything about nothing.