Abstract
The philosopher Averroes (1126-1198), known to the West as the Commentator on Aristotle, was also a physician. This suggests the question: Were medicine and philosophy two different and parallel interests in Averroes' intellectual life or were they in some way related within a single context of wisdom? By investigating Averroes' main, but often-neglected medical work, the Colliget, together with other relevant texts, this article showsthat Averroes sees medicine as based on principles of natural philosophy and parallel to moral philosophy. In both medical and philosophical contexts the principle of equilibrium is stressed.