Aristotle’s theology is based on his perception that there must be something above and beyond the chains of cause and effect for those chains to exist at all. Aristotle perceives change and motion as deep mysteries. Everything is subject to change and motion, but nothing changes or moves without cause. Tracing how things cause one another to change and move is the source of many of Aristotle’s most fundamental insights. He believes that all causes must themselves be caused and all motion must be caused by something that is already in motion. The trouble with this belief is that it leads to an infinite regress: if all causes have antecedent causes, there is no first cause that causes motion and change to exist in the first place. Why is there change and motion rather than stillness? Aristotle answers that there must be a first cause, an unmoved mover, that is the source of all change and motion while being itself unchanging and unmoving. To motivate the heavens to move, this unmoved mover must be perfect, so Aristotle comes to associate it with God.