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This opes of warded Fort the valvarte-wall, maketh the felon friend his faith forego:
This changeth noblest Thane to vilest Thrall and yieldeth Captains to the luring foe:
This maketh purest maiden foully fall, and know no fear, no reck of Honour trow:
This Art and Science shall at times deprave, blind sanest judgment, consciences enslave: