The pin is mightier than the sword. If the student forces himself to examine all moves that smite, however absurd they may look at first glance, he is on the way to becoming a master of tactics. A good eye for smites is far more important than a knowledge of strategical principles. It's always better to sacrifice your opponent's men. Before the endgame, the gods have placed the middlegame.
Every pawn is a potential Queen.
The Passed Pawn is a criminal, who should be kept under lock and key. Mild measures, such as police surveillance, are not sufficient. Passed Pawn increases in strength as the number of pieces on the board diminishes. Any material change in a position must come about by mate, a capture, or a Pawn -promotion. Even a poor plan is better than no plan at all.