A scientist is as weak and human as any man, but the pursuit of science may ennoble him even against his will.

Fifty years," I hackneyed, "is a long time." "Not when you're looking back at them," she said. "You wonder how they vanished so quickly.

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

I do not fear computers. I fear the lack of them.

They don't want equal time - they want all the time there is.

Early in my school career, I turned out to be an incorrigible disciplinary problem. I could understand what the teacher was saying as fast as she could say it, I found time hanging heavy, so I would occasionally talk to my neighbor. That was my great crime, I talked in school.

Married life had taught Toran the futility of arguing with a female in a dark-brown mood.