Abstract

All philosophers agree on the principle of the existence of motion. Since motion belongs to the category of philosophical secondary intelligibles, it is not definable in terms of limits or imprints; however, we might be able to explain it with respect to its gradual change.In Aristotle's view, there exists a kind of motion without a beginning and an end, and it is the circular motion of spheres, which is perpetual, continuous, and eternal, but all other motions have a beginning and an end. In Mulla Sadra's view, too, motion is eternal and limitless; however, his view of pre-eternal and eternal is bases on the trans-substantial motion. In some places he speaks about the continuity and subsistence of spherical motion on the basis of the principles advocated by his preceding philosophers; nevertheless, he emphasizes that what he means here is horizontal motion and, then, presents his ultimate view of trans-substantial motion.