12. The ordinary concept of God among Christians is a concept of a person because God is called a person in the Athanasian doctrine of the Trinity. The better educated, though, claim that God is invisible. This is because they cannot understand how a human God could have created heaven and earth and filled the universe with his presence, along with other things that pass the bounds of understanding as long as people do not realize that Divinity is not in space. Still, people who turn to the Lord alone think of one who is both divine and human, and therefore think of God as a person.