Aristotle’s Metaphysics (A History of Western Philosophy)

Aristotle is similar to Plato, but with more common sense. His argument for God’s existence is the First Cause: There must be something that begins motion, and this “something” must itself be unmoved and eternal.

The object of desire and thought cause movement in this way without being in motion themselves. Unlike the billiard ball which must be in motion to produce motion, God is pure thought, and can be the unmoved mover

"A gilded No is more satisfactory than a dry yes" - Gracian