20 What is this hopeless quagmire of error into which You have plunged me? For I have learned all this and have come to believe it; this faith is so ingrained into my mind that I have neither the power nor the wish to change it. Why this deception of an unhappy man, this ruin of a poor wretch in body and soul, by deluding him with falsehoods concerning Yourself? After the Red Sea had been divided, the splendour on the face of Moses, descending from the Mount, deceived me.
He had gazed, in Your presence, upon all the mysteries of heaven, and I believed his words, dictated by You, concerning Yourself. And David, the man that was found after Your own heart, has betrayed me to destruction, and Solomon, who was thought worthy of the gift of Divine Wisdom, and Isaiah, who saw the Lord of Sabaoth and prophesied, and Jeremiah consecrated in the womb, before he was fashioned, to be the prophet of nations to be rooted out and planted in, and Ezekiel, the witness of the mystery of the Resurrection, and Daniel, the man beloved, who had knowledge of times, and all the hallowed band of the Prophets; and Matthew also, chosen to proclaim the whole mystery of the Gospel, first a publican, then an Apostle, and John, the Lord's familiar friend, and therefore worthy to reveal the deepest secrets of heaven, and blessed Simon, who after his confession of the mystery was set to be the foundation-stone of the Church, and received the keys of the kingdom of heaven, and all his companions who spoke by the Holy Ghost, and Paul, the chosen vessel, changed from persecutor into Apostle, who, as a living man abode under the deep sea and ascended into the third heaven, who was in Paradise before his martyrdom, whose martyrdom was the perfect offering of a flawless faith; all have deceived me.
Source: On the Trinity (New Advent)