Every religion seems like a fantasy to outsiders, but as holy truth to those of the faith.

It has always been my ambition to die in harness with my head face down on a keyboard and my nose caught between two of the keys.

Uncertainty that comes from knowledge (knowing what you don't know) is different from uncertainty coming from ignorance.

All roads lead to Trantor, says the old proverb, and that is where all stars end.

If you're born in a cubicle and grow up in a corridor, and work in a cell, and vacation in a crowded sun-room, then coming up into the open with nothing but sky over you might just give you a nervous breakdown.

There never can be a man so lost as one who is lost in the vast and intricate corridors of his own lonely mind, where none may reach and none may save.

Humanity is cutting down its forests, apparently oblivious to the fact that we may not be able to live without them.