First, By this word Three, is intimated the Father, the Word, and the Holy Ghost, and they are said to be three, 1. Because those appellations that are given them in scripture, demonstrate them so to be, to wit, Father, Son and Holy Ghost. 2. Because their acts one towards another discover them so to be.
Secondly, These three are distinct. 1. So distinct as to be more than one, only: There are three. 2. So distinct as to subsist without depending. The Father is true God, the Son is true God, the Spirit is true God. Yet the Father is one, the Son is one, the Spirit is one: The Father is one of himself, the Son is one by the Father, the Spirit is one from them both. Yet the Father is not above the Son, nor the Spirit inferior to either: The Father is God, the Son is God, the Spirit is God.
Among the three then there is not superiority. 1. Not as to time; the Father is from everlasting, so is the Son, so is the Spirit. 2. Not as to nature, the Son being of the substance of the Father, and the Spirit of the substance of them both. 3. The fulness of the Godhead is in the Father, is in the Son, and is in the Holy Ghost.
The Godhead then, though it can admit of a Trinity, yet it admitteth not of inferiority in that Trinity: if otherwise, then less or more must be there, and so either plurality of gods, or something that is not God: so then, Father, Son and Spirit are in the Godhead, yet but one God; each of these is God over all, yet no Trinity of Gods, but one God in the Trinity.
Explication.—The Godhead then is common to the three, but the three themselves abide distinct in that Godhead: Distinct, I say, as Father, and Son, and Holy Spirit. This is manifest further by these several positions.
First, Father and Son are relatives, and must needs therefore have their relation as such: A Father begetteth, a Son is begotten.
Proof.—"Who hath ascended up into heaven, or descended? Who hath gathered the wind in his fists? Who hath bound the waters in a garment? What is his name, and what is his son's name, if thou canst tell?" (Pro 30:4).
"God so loved the world, that he gave his only begotten Son," &c.
(John 3:16).
"The Father sent the Son to be the Saviour of the world" (1 John 4:14).
Secondly, The Father then cannot be that Son he begat, nor the Son that Father that begat him, but must be distinct as such.