[De articulis fidei]

...of the Gentiles or pagans who posit many gods, against whom it is said in Exodus 20: "You shall have no other gods before me." 2 The second is the error of the Manichaeans, who posit two first principles: one from whom all good things come, and another from whom all evil things come. Against them, it is said in Isaiah 45: "I am the Lord, and there is no other; I form the light and create darkness, I make peace and create evil," because He Himself, according to His justice, inflicts the evil of punishment, and when He beholds in His creature the evil of guilt, He permits it to exist. 3 The third is the error of the Anthropomorphites, who do indeed posit one God, but say He is corporeal and formed after the manner of a human body. Against them, it is said in John 4: "God is spirit." Isaiah 40:18 is referenced here, though the text is partially obscured. "To whom then will you liken God, or what likeness will you compare to him?" The fourth is the error of the Epicureans, saying that God has neither knowledge nor providence regarding human affairs. Against them, it is said in the last chapter of 1 Peter: "Cast all your anxiety on him, because 5 he cares for you." The fifth is the error of certain Gentile philosophers, saying that God is not omnipotent, but that He can only do those things that happen by nature. Against them, it is said in the Psalm: "Whatever the Lord pleased, he did." Therefore, all these either detract from the unity of the divine essence or from His perfection. Hence, against all of them, it is stated in the symbolum creed/profession of faith: "I believe in one God, the Father."

The second article is that there are three divine persons in one essence, according to that which is said below in the last chapter of John: "There are three that bear record in heaven, the Father, the Word, and the Holy Spirit: and these three are one." Regarding this article, there are many errors. The first is that of Sabellius, who posited one essence but denied the trinity of persons, saying...