Therefore the skillful leader subdues the enemy's troops without any fighting; he captures their cities without laying siege to them; he overthrows their kingdom without lengthy operations in the field.
Sun TzuOf old the expert in battle would first make himself invincible and then wait for his enemy to expose his vulnerability.
Sun TzuHence that general is skilful in attack whose opponent does not know what to defend; and he is skilful in defense whose opponent does not know what to attack.
Sun Tzu