4.5 Chapter: Tactical Positions 4.5 < /br> Translation: Security against defeat implies defensive tactics; ability to defeat the enemy means taking the offensive. < /br> CommentaryTo avoid losing, you must be able to defend. Knowing this, you can spend too much on building a strong defense. To win, however, you must be able to attack. And so you must also plan and prepare for winning attacks. Chang Yu said: “Attack is the secret of defense; defense is the planning of an attack.” 6. Standing on the defensive indicates insufficient strength; attacking, a superabundance of strength.