Of course you understand how that is done, and there is no need of my explaining it. "Neither confounding the persons nor dividing the substance." You see what a predicament that would leave the deity in if you divided the substance. "For one is the person of the Father, another of the Son, and another of the Holy Ghost; but the Godhead of the Father, and of the Son, and of the Holy Ghost is all one"--you know what I mean by Godhead. "In glory equal, and in majesty coëternal. Such as the Father is, such is the Son, such is the Holy Ghost. The Father is uncreated, the Son uncreated, the Holy Ghost uncreated. The Father incomprehensible, the Son incomprehensible, the Holy Ghost incomprehensible." And that is the reason we know so much about the thing. "The Father is eternal, the Son eternal, the Holy Ghost eternal, and yet there are not three eternals, only one eternal, as also there are not three uncreated, nor three incomprehensibles, only one uncreated, one incomprehensible." "In like manner, the Father is almighty, the Son almighty, the Holy Ghost almighty. Yet there are not three almighties, only one Almighty. So the Father is God, the Son God, the Holy Ghost God, and yet not three Gods; and so, likewise, the Father is Lord, the Son is Lord, the Holy Ghost is Lord, yet there are not three Lords, for as we are compelled by the Christian truth to acknowledge every person by himself to be God and Lord, so we are all forbidden by the Catholic religion to say there are three Gods, or three Lords. The Father is made of no one; not created or begotten. The Son is from the Father alone, not made, not created, but begotten. The Holy Ghost is from the Father and the Son, not made nor begotten, but proceeding." You know what proceeding is. "So there is one Father, not three Fathers." Why should there be three fathers, and only one Son? "One Son, and not three Sons; one Holy Ghost, not three Holy Ghosts; and in this Trinity there is nothing before or afterward, nothing greater or less, but the whole three persons are coëternal with one another and coëqual, so that in all things the unity is to be worshiped in Trinity, and the Trinity is to be worshiped in unity. Those who will be saved must thus think of the Trinity. Furthermore, it is necessary to everlasting salvation that he also believe rightly the incarnation of our Lord Jesus Christ. Now the right of this thing is this: That we believe and confess that our Lord Jesus Christ, the Son of God, is both God and man. He is God of the substance of his Father begotten before the world was."