Pope Saint Leo the Great Quote

My dear brethren, there is no doubt that the Son of God took our human nature into so close a union with himself that one and the same Christ is present, not only in the firstborn of all creation, but in all his saints as well. The head cannot be separated from the members, nor the members from the head. Not in this life, it is true, but only in eternity will God be all in all, yet even now he dwells, whole and undivided, in his temple the Church. Such was his promise to us when he said: See, I am with you always, even to the end of the world.

-- Pope Saint Leo the Great