Your body has to be in top condition. Your Chess deteriorates as your body does. You can't separate body from mind

I don't recommend trying to cram a lot of long opening-move variations into your head. The main idea behind any opening is to get a strong pawn center and give your pieces a lot of scope so that you cramp your opponent's position and can attack weaknesses in his game.

Its just you and your opponent at the board and you're trying to prove something

When I won the World Championship in '72, the United States had an image of, you know, a football country, baseball country, but nobody thought of it as an intellectual country.

Psychologically, you have to have confidence in yourself and this confidence should be based on fact.

I want to see the U.S. wiped out. Death to the U.S.

I think it's almost definite that the game is a draw theoretically.