Know thy self, know thy enemy.

To ... not prepare is the greatest of crimes; to be prepared beforehand for any contingency is the greatest of virtues.

When you are ignorant of the enemy but know yourself, your chances of winning or losing are equal.

We may distinguish six kinds of terrain, to wit: (1) Accessible ground; (2) entangling ground; (3) temporising ground; (4) narrow passes; (5) precipitous heights; (6) positions at a great distance from the enemy.

Appear at points which the enemy must hasten to defend; march swiftly to places where you are not expected.

Thus the expert in battle moves the enemy, and is not moved by him.

Ponder and deliberate before you make your move. He will conquer who has learned the artifice of deviation. Such is the art of maneuvering.