Don't you see? It's Galaxy-wide. It's a worship of the past. It's a deterioration - a stagnation! - Isaac Asimov

You are now too old to be made a scholar after my fashion, but you are never too old to learn more than you already know and to become able to do more than you already can.

The robot said, 'I have been trying, friend Julius, to understand some remarks Elijah made to me earlier. Perhaps I am beginning to, for it suddenly seems to me that the destruction of what should not be, that is, the destruction of what you people call evil, is less just and desirable than the conversion of thi sevil into what you call good.'
He hesitated, then, almost as though he were surprised at his own owrds, he said, 'Go, and sin no more!

There is more to a science fiction story than the science it contains. There is also the story.