Full Idea
Movement can arise within a motionless animal out of the object itself, rather than being due to some external agent. But why should this not also be true of the universe?
Gist of Idea
If movement can arise within an animal, why can't it also arise in the universe?
Source
Aristotle (Physics [c.337 BCE], 252b24)
Book Reference
Aristotle: 'Physics', ed/tr. Waterfield,Robin [OUP 1996], p.190
A Reaction
A nice objection to the Unmoved Mover concept of God. Unfortunately it is ruined by the modern realisation that an animal is never 'motionless', because brain activity is continuous, and ceases only with death.