My favorite definition of an intellectual: 'Someone who has been educated beyond his/her intelligence'.

As our own species is in the process of proving, one cannot have superior science and inferior morals. The combination is unstable and self-destroying.

The moon is the first milestone on the road to the stars.

Now times had changed, and the inherited wisdom of the past had become folly.

Then he [The Star Child] waited, marshaling his thoughts and brooding over his still untested powers. For though he was master of the world, he was not quite sure what to do next. But he would think of something.

Attempting to define science fiction is an undertaking almost as difficult, though not so popular, as trying to define pornography... In both pornography and SF, the problem lies in knowing exactly where to draw the line.

I think in the long run the money that s been put into the space program is one of the best investments this country has ever made . . .This is a downpayment on the future of mankind. It's as simple as that.