Every stink that fights the ventilator thinks it is Don Quixote.

We are like snails, each stuck to his own leaf.

Science is turning into a monastery for the Order of Capitulant Friars. Logical calculus is supposed to supersede man as moralist. We submit to the blackmail of the 'superior knowledge' that has the temerity to assert that nuclear war can be, by derivation, a good thing, because this follows from simple arithmetic.

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.

Our ability to adapt and therefore to accept everything is one of our greatest dangers. Creatures that are completely flexible, changeable, can have no fixed morality.

I never read to kill time. Killing time is like killing someone's wife or a child. There is nothing more precious for me than time.

And yet we knew, for a certainty, that when first emissaries of Earth went walking among the planets, Earth's other sons would be dreaming not about such expeditions but about a piece of bread.