The expert in battle seeks his victory from strategic advantage and does not demand it from his men.
Carefully study the well-being of your men, and do not overtax them. Concentrate your energy and hoard your strength. Keep your army continually on the move, and devise unfathomable plans.
Knowledge of the enemy's dispositions can only be obtained from other men.
Ponder and deliberate before you make a move.
The peak efficiency of knowledge and strategy is to make conflict unnecessary.
A kingdom that has once been destroyed can never come again into being; nor can the dead ever be brought back to life.