It is the essence of a good title, in my opinion, that it means more after you have completed the story than before you started it. If that is not tr… - Isaac Asimov

We have: One, a robot may not injure a human being, or, through inaction, allow a human being to come to harm.

that frequent phenomenon in history: the republic whose ruler has every attribute of the absolute monarch but the name. It therefore enjoyed the usual despotism unrestrained even by those two moderating influences in the legitimate monarchies: regal ‘honour’ and court etiquette.

The image of Hari Seldon reached into open air and the book once more appeared in his hand. He opened it and said: "But whatever devious course your future history may take, impress it always upon your descendants that the path has been marked out, and that at its end is a new and greater Empire!