To insult someone we call him 'bestial. For deliberate cruelty and nature, 'human' might be the greater insult.

Democracy cannot survive overpopulation. Human dignity cannot survive it. Convenience and decency cannot survive it. As you put more and more people into the world, the value of life not only declines, but it disappears. It doesn't matter if someone dies.

We are reaching the stage where the problems we must solve are going to become insoluble without computers. I do not fear computers, I fear the lack of them.

It's the writing that teaches you.

The final end of Eternity, and the beginning of Infinity

Any book worth banning is a book worth reading.

Many adults, whether consciously or unconsciously, find it beneath their adult dignity to do anything as childish as read a book, think a thought, or get an idea. Adults are rarely embarrased at having forgotten what little algebra or geography they once learned