He then asked: “What is your faith, then?” “I believe with all the apostles, that he is the Son of God, as Peter confessed (Matt. 16:16; John 20; 6:69), visible and invisible; that the Word by which all things were made became flesh in Mary, through the power of the Most High.” He asked whether the Word became flesh like Lot’s wife became a pillar of salt, or the water, wine. I said: “No.” He asked: “How then?” I said: “It became man, and it continued to be the Word; that is, the Word which was invisible became visible; that which was impalpable became palpable; that which was impassible became passible.” He said: “Was the Word not God?” I replied: “It is God and man.” “Did God die?” he said. I replied: “He died according to his humanity, as Peter says: ‘put to death according to the flesh, but quickened according to the spirit.’” 1 Pet. 3:18.
I then asked him, how he confessed the unity. He confessed three persons and one God. I asked whether the Holy Ghost were a person. He said: “Yes.” I said: “When Mary was greeted by the angel, that she should conceive, and she did not know how this should come to pass, as she had never known a man, the angel said: The Holy Ghost shall come upon thee. Luke 1:26. Now, if the Holy Ghost is a person, then one person conceived another. And in the Acts of the Apostles it is written that when the apostles received the Holy Ghost, he sat upon each of them. Acts 2:3. But a person can sit only upon one man. And in the first chapter (v. 7) of the Book of Wisdom it is written that the Spirit of the Lord filleth the world. To what person would you compare him?” He did not know what to say. He then said: “I do not consider them persons such as Pieter, Klaes and Jan.” I said: “To whom then do you compare them?” They then exchanged a few words in Latin, and said: “We only call them persons: did you think that we considered them three human beings?” I said: “Yes.” He said: “If you have taught men so, you must confess that you have slandered us, and that you are a false teacher.” I said: “I am no teacher; I have enough to do to teach myself.” I added: “You call them persons; are they not such? why then do you call them three persons.” He said: “It amounts to the same thing.” I said: “It does not; a person is a human being, and you certainly cannot compare them to human beings.” Then he said: “God the Father is not the Son; the Son is not the Father; the Holy Ghost is neither the Father nor the Son. And these are three; the one is what the other is not, and though they are three, yet are they but one God.” I said: “This is also my faith, and in accordance with it I know but one person, that is Jesus Christ, who was visible and palpable; but the others I do not know what to compare them to”. On this point we agreed, and he let go his persons. He then asked again whether God had died. I said: “You have sat here and acknowledged to me that you do not consider the Word to be the Father, nor the Father to be the Word, though they, according to the Godhead, are one God; but you regard them as three witnesses; and two of these witnesses did not become man, but the Word, by which all things were made, became flesh, as John says in the first chapter [of his gospel]. Although this Word became man, it therefore does not cease to be one God with the Father; else it could not be God and man.”