You can never properly predict the future as it really turns out. So you are doing something a little different when you write science fiction. You are trying to take a different perspective on now.

A lot of scientists act on their beliefs and so do things that look crazy to the rest of us.

It would take 2,000 Vietnam Memorials to list the [Twentieth] century's war dead.

It was not power that corrupted people, but fools who corrupted power.

Humans were still not only the cheapest robots around, but also, for many tasks, the only robots that could do the job. They were self-reproducing robots too. They showed up and worked generation after generation; give them 3000 calories a day and a few amenities, a little time off, and a strong jolt of fear, and you could work them at almost anything. Give them some ameliorative drugs and you had a working class, reified and coglike.

The invisible hand never picks up the check.

It was a world of acts, and words had no more influence on acts than the sound of a waterfall has on the flow of the stream.