Trantor becomes more specialized, it becomes more vulnerable, less able to defend itself. Further, as it becomes more and more the administrative cen… - Isaac Asimov

I am trying now to re-create in my mind the picture of the man as I saw him in 1939- he, the revered author of Sinister Barriers, I the novice. I think I can rely on my near-photographic memory for the purpose. (I call it "near-photographic" because I can only remember things that happen to be lying around near photographs.)

Let's see, as I recall, he is six-feet seven-inches tall (when he is sitting down, that is) with a long and majestic English face. Then, too, I distinctly remember, there was a small flashing golden aura about his head, the occasional play of hissing flashes when he moved it suddenly, and the distant rumble of thunder when he spoke.

La entropía, pequeña, es una palabra que significa la cantidad de desgaste del Universo.

The Solarians have given up something mankind has had for a million years; something worth more than atomic power, cities, agriculture, tools, fire, everything; because it's something that made everything else possible. (...) The tribe, sir. Co-operation between individuals. Solaria has given it up entirely. It is a world of isolated individuals and the planet's only sociologist is delighted that this is so. That sociologist, by the way, never heard of sociomathematics, because he is inventing his own science. There is no one to teach him, no one to help him, no one to think of something he himself might miss. The only science that really flourishes on Solaria is robotics and there are only a handful of men involved in that, and when it came to an analysis of the interaction of robots and men, they had to call in an Earthman to help.