Arthur C. Clarke

It has yet to be proven that intelligence has any survival value. ”

New ideas pass through three periods: 1) It can't be done. 2) It probably can be done, but it's not worth doing. 3) I knew it was a good idea all along! ”

This is the first age that's ever paid much attention to the future, which is a little ironic since we may not have one. ”

How inappropriate to call this planet Earth when it is quite clearly Ocean. ”

Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering. ”

It is not easy to see how the more extreme forms of nationalism can long survive when men have seen the Earth in its true perspective as a single small globe against the stars. ”

The only way to discover the limits of the possible is to go beyond them into the impossible. ”

The limits of the possible can only be defined by going beyond them into the impossible. ”

Perhaps, as some wit remarked, the best proof that there is Intelligent Life in Outer Space is the fact it hasn't come here. Well, it can't hide forever - one day we will overhear it. ”

I don't pretend we have all the answers. But the questions are certainly worth thinking about. ”