Giese was an unemotional man, but then in the study of Solaris emotion is a hindrance to the explorer. Imagination and premature theorizing are positive disadvantages in approaching a planet where-as has become clear-anything is possible... The fact is that in spite of his cautious nature the scrupulous Giese more than once jumped to premature conclusions. Even when on their guard, human beings inevitably theorize.

People make filthy things with the freedom they regained.

My pessimism (which, by the way, is far from absolute) originated with my despair in the lack of perfection to be found in human nature. I was attempting in my successive books to show the inevitable handicap of the human condition.

So one must be resigned to being a clock that measures the passage of time, now out of order, now repaired, and whose mechanism generates despair and love as soon as its maker sets it going? Are we to grow used to the idea that every man relives ancient torments, which are all the more profound because they grow comic with repetition? That human existence should repeat itself, well and good, but that it should repeat itself like a hackneyed tune, or a record a drunkard keeps playing as he feeds coins into the jukebox.

A smart machine will first consider which is more worth its while: to perform the given task or, instead, to figure some way out of it.

Practically all SF is trash.

The whole plan hinged upon the natural curiosity of potatoes.