We all know we fall. Newton's discovery was that the moon falls, too-and by the same rule that we do.

The easiest way to solve a problem is to deny it exists.

One would suppose that the battle for religious liberty was won in the United States two hundred years ago. However, in the time since, and right now, powerful voices are always raised in favor of bigotry and thought control. It is useful, then, to have a compendium of the thoughts of great men and women of all faiths (and of none) on the subject, to convince us that we men and woman of freedom are not and never have been alone.

Life would be impossible on such a planet. It wouldn't get enough heat and light, and if it rotated there would be total darkness half of every day. There wouldn't be any native inhabitants. You couldn't expect life - which is fundamentally dependent on light - to develop under such extreme conditions of light deprivation. Half of every axial rotation spent in Darkness! No, nothing could exist under conditions like that.

They won't listen. Do you know why? Because they have certain fixed notions about the past. Any change would be blasphemy in their eyes, even if it were the truth. They don't want the truth; they want their traditions.

A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

I am not responsible for what other people think. I am responsible only for what I myself think, and I know what that is. No idea I've ever come up with has ever struck me as a divine revelation. Nothing I have ever observed leads me to think there is a God watching over me.