It is made in perfect accordance with nature; for no habit of possession brings forth for itself, but for him who possesses it; as grammar does for the grammarian, and music for the musician, and mathematical science for the mathematician; because it is a part of him, and stands in need of him. And the habit is not received as a thing in need of something, just as fire has no need of heat, for it is heat to itself; and it gives a portion of the participation in it to those who approach it.
Why when he was ninety and nine years old does the sacred writer say, "The Lord God appeared to him and said, I am the Lord thy God?" (Genesis 17:1).