I ... have two vocations: chess and engineering. If I played chess only, I believe that my success would not have been significantly greater. I can play chess well only when I have fully convalesced from chess and when the 'hunger for chess' once more awakens within me.

Chess is the art of analysis.

Chess is the art which expresses the science of logic.

In short, we can see Karpov as an exploiter of other people’s ideas. His ability to use these ideas is not at issue, but he himself is about as fertile as a woman who has been sterilized is.

Memorization of variations could be even worse than playing in a tournament without looking in the books at all.

If Tal sacrifices a piece, take it. If Petrosian sacrifices a piece, don't take it.

If Tal would learn to program himself properly, then it would become quite impossible to play against him.