Strength of the body is the power and swiftness of action.  You must keep yourself fit at all times, both physically and mentally.  The bear's girth highlights its strength, as it is a ferocious foe in combat.  The bear's girth, however, belies its lithe agility and sharp mind.  These are surprises you will use to your advantage.$B$BYou must rely on the strength of the bear's body in order to master the way of the Claw.