And then, when human beings arrive, the robots can be restored to more robotic schemes of behavior. - Isaac Asimov

One might suppose that reality must be held to at all costs. However, though that may be the moral thing to do, it is not necessarily the most useful thing to do. The Greeks themselves chose the ideal over the real in their geometry and demonstrated very well that far more could be achieved by consideration of abstract line and form than by a study of the real lines and forms of the world; the greater understanding achieved through abstraction could be applied most usefully to the very reality that was ignored in the process of gaining knowledge.

With the blind jumps we took through hyperspace, it's lucky we didn't land up in a sun's belly.

Consider that until now the power of trade has been underestimated. It has been thought that it took a priesthood under our control to make it a powerful weapon. That is not so, and this is my contribution to the Galactic situation. Trade without priests! Trade alone! It is strong enough. Let us become very simple and specific. Korell is now at war with us. Consequently our trade with her has stopped. But – notice that I am making this as simple as a problem in addition – in the past three years she has based her economy more and more upon the atomic techniques which we have introduced and which only we can continue to supply. Now what do you suppose will happen once the tiny atomic generators begin failing, and one gadget after another goes out of commission?