Don Quixote, a poor gentleman of La Mancha, a man of gentle and amiable disposition and otherwise sane, has had his wits disordered by inordinate devotion to the tales of chivalry, and imagines himself called upon to roam the world in search of adventures on his old horse, Rosinante, and accoutred in rusty armour, accompanied by a squire in the shape of rustic Sancho Panza..." -Oxford Companion to English Literature