 Motion is one of the main issues in the Physics and Avempace had original views on the issue. Book VII of the Aristotelian Physics does not fit into the sequence of Books V, VI and VIII and its chapters deal with subjects not related to each other. One of them mentions that every movable or mobile is moved by a mover different from itself (Phys. VII.1, 241b 24). Avempace considers the tenet that everything is moved by something else, and says: