I'm quite fond of the writer who told a beginning author, "If you've got a message, use Western Union."

The intelligent minority of this world will mark 1 January 2001 as the real beginning of the 21st century and the Third Millennium.

We over estimate technology in the short term and under estimate technology in the long term.

We have to abandon the idea that schooling is something restricted to youth. How can it be, in a world where half the things a man knows at 20 are no longer true at 40 - and half the things he knows at 40 hadn't been discovered when he was 20?

The time was fast approaching when Earth, like all mothers, must say farewell to her children.

There were some things that only time could cure. Evil men could be destroyed, but nothing could be done with good men who were deluded.

There is no reason to assume that the universe has the slightest interest in intelligence—or even in life. Both may be random accidental by-products of its operations like the beautiful patterns on a butterfly's wings. The insect would fly just as well without them.