Four Humors

The Four Humors is an ancient medical theory originating in Greece, suggesting that human health and personality are governed by four bodily fluids: blood, phlegm, black bile, and yellow bile. Each humor is associated with specific traits: blood is linked to a cheerful, sociable disposition; phlegm corresponds to calmness and dependability; black bile relates to introspection and melancholy; and yellow bile is connected to irritability and ambition. This theory influenced medicine and personality assessment for centuries, proposing that a balance among these humors is essential for physical and mental well-being.