47 In all things the blessed Apostle preserves the unchangeable teaching of the Gospel faith. The Lord Jesus Christ is proclaimed as God in such wise that neither does the Apostle's faith, by calling Him a God of a different order, fall away to the confession of two Gods, nor by making God the Son inseparable from the Father does it leave an opening for the unholy doctrine of a single and solitary God. For when he says, in the form of God and in the glory of the Father the Apostle neither teaches that They differ one from another, nor allows us to think of Him as not existing. For He Who is in the form of God neither ends by becoming another God nor Himself loses His Godhead: for He cannot be severed from the form of God since He exists in it, nor is He, Who is in the form of God, not God Just as He Who is in the glory of God cannot be anything else than God, and, since He is God in the glory of God, cannot be proclaimed as another god and one different from the true God, seeing that by reason of the fact that He is in the glory of God He possesses naturally from Him in Whose glory He is, the property of divinity.
Source: On the Trinity (New Advent)