The temptations of God were always more dangerous for mankind than those of Satan.

The discoveries of yesterday are the truisms of tomorrow, because we can add to our knowledge but cannot subtract from it.

Space-ships and time machines are no escape from the human condition.

The definition of the individual was: a multitude of one million divided by one million.

Laughter and weeping, the Greek masks of comedy and tragedy, mark the extremes of a continuous spectrum; both provide channels for the overflow of emotion; both are

The evolution of the brain not only overshot the needs of prehistoric man, it is the only example of evolution providing a species with an organ which it does not know how to use.

I am not sure whether ethical absolutes exist. But I am sure that we have to act as if they existed or civilization perishes.