 Avempace does not extend in the issue of elementary qualities as moving powers, and focuses on the soul as a moving power (elemental bodies do not have souls; instead, they have natures). The case of the human soul interests him most and he wants to explain how intellectual apprehension moves man in reasoning and action. Avempace will deal, in a more satisfactory way, with the issue of rank of ideas and forms in relation to human activity in other works.