The most important part of our lives-our sensations, emotions, desires, and aspirations-takes place in a universe of illusions which science can attenuate or destroy, but which it is powerless to enrich.

As machines get to be more and more like men, men will come to be more like machines.

If only the fit survive and if the fitter they are the longer they survive, then Volvox must have demonstrated its superb fitness more conclusively than any higher animal ever has.

A humanist is anyone who rejects the attempt to describe or account for man wholly on the basis of physics, chemistry or animal behaviour.

The cockroach and the bird were both here long before we were. Both could.

It is sometimes easier to head an institute for the study of child guidance than it is to turn one brat into a decent human being.

Security depends not so much upon how much you have, as upon how much you can do without.