 Form always has a finite potentiality because it is divisible, and it is divisible because the body of which it is the form, is divisible, and the body is divisible because it is finite yet. The celestial body is finite but its motion is eternal. Averroes finds a way-out of the conflict: the celestial body is not composed of matter and form, it is simple, and no material form exists in it (LC 427BC; MC Wolfson 594) while form in material substances subsists because it is part of the composite. By exclusion we can conclude: the celestial body is an immaterial form.