Any smoothly functioning technology will have the appearance of magic.

It is a good principle in science not to believe any 'fact'---however well attested---until it fits into some accepted frame of reference. Occasionally, of course, an observation can shatter the frame and force the construction of a new one, but that is extremely rare. Galileos and Einsteins seldom appear more than once per century, which is just as well for the equanimity of mankind.

Training was one thing, reality another.

The limits of the possible can only be defined by going beyond them into the impossible.

Isaac Asimov is, in reality, based on something I had invented a few years previously.

The difference between machines and human beings is that human beings can be reproduced by unskilled labour.

Almost any seat was comfortable at one-sixth of a gravity.