How are the theory of opposites and four humours theory differen5t?

The theory of opposites, rooted in ancient philosophies, posits that contrasting forces (like hot/cold, wet/dry) are essential for understanding balance and change in the universe. In contrast, the four humours theory, originating from ancient Greek medicine, suggests that human health and temperament are influenced by four bodily fluids (blood, phlegm, yellow bile, and black bile) and their balance. While both theories emphasize balance, the theory of opposites focuses on universal forces, whereas the four humours theory is specifically concerned with physiological and psychological states in individuals.