Nothing limits intelligence more than ignorance; nothing fosters ignorance more than one's own opinions; nothing strengthens opinions more than refusing to look at reality.

Sitting down and weeping is what women have done for centuries, and it has done no good at all. Nor praying. God has given us the earth. He is not waiting in the next room, ready to fix it for us if we ruin it. If we do not care for it, no one will. On other worlds, other races of men perhaps do better than we have done. He cares for us, but he does not control what we do.

Other people's risks are statistical. When it's your risk, your own child, it isn't statistical anymore.

Creation has the truth written all over it - the age of the universe, the history of the world - but nine-tenths of mankind either don't know it or think it's a sham, because it isn't what their book or their prophet says, and it isn't cozy or manipulable enough.

We live in a time like dreaming.... The edges of our lives flutter and change as we watch them. Listen to the dream.

Science fiction still is an idea genre.

I'm not sure a world run by women would be any better. They're human beings!