Hitherto man had to live with the idea of death as an individual; from now onward mankind will have to live with the idea of its death as a species.

The principle that the end justifies the means is and remains the only rule of political ethics; anything else is just a vague chatter and melts away between one’s fingers.

A writer's ambition should be to trade a hundred contemporary readers for ten readers in ten years' time and for one reader in a hundred years' time.

I believe that the evidence for telepathy is overwhelming and that it is a part of reality that is above science. Science allows us to glimpse [only] fragments of reality.

Innovation is a twofold threat to academic mediocrities: it endangers their oracular authority, and it evokes the deeper fear that their whole, laboriously constructed intellectual edifice might collapse.

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

The purposiveness of all vital processes, the strategy of the genes and the power of the exploratory drive in animal and man, all seem to indicate that the pull of the future is as real as the pressure of the past.