Wilhelm Steinitz

Chess is not for the faint-hearted; it absorbs a person entirely. To get to the bottom of this game, he has to give himself up into slavery. Chess is difficult, it demands work, serious reflection and zealous research.

The task of the positional player is systematically to accumulate slight advantages and try to convert temporary advantages into permanent ones, otherwise the player with the better position runs the risk of losing it.

Chess is so inspiring that I do not believe a good player is capable of haviong an evil thought during the game.