The ability to create and to control the tension of battle is perhaps the principal attainment of the great player.
To avoid losing a piece, many a person has lost the game
It's always better to sacrifice your opponent's men
Some part of a mistake is always correct
It is said that an ounce of common sense can outweigh a ton of 'variations'.
Psychologically, the choice of an appropriate opening is of the utmost importance for a player's success in a tournament.