 An account of place is particularly significant given that motion with respect to place was frequently viewed as the primary species of motion (although Avicenna would rank positional motion along side local motion, if not above it). The reason for giving priority to place or position is that change in quantity involves the increase or decrease of the place that a body occupies; and change in quality involves a body’s coming into proximity with some cause that brings about the alteration, where “coming into proximity” refers to a change of place either in the body or in the cause (Avicenna, [Ph], 4.9). 