In Greek mythology, a centaur is a creature that is half-human and half-horse. They are characterized by the upper body of a man and the lower body of a horse, symbolizing the dual nature of humanity: wild and civilized. Centaurs often embody the struggle between instinct and reason, representing various roles such as warriors, philosophers, and revelers. Notable centaurs include Chiron, who was wise and skilled in healing, contrasting with the more unruly behavior of others. Their stories contribute to the understanding of human nature in Greek myth.