1. As, then, after those first discussions which, according to the requirements of the case, we held at the beginning regarding the Father, Son, and Holy Spirit, it seemed right that we should retrace our steps, and show that the same God was the creator and founder of the world, and the Father of our Lord Jesus Christ, i.e. that the God of the law and of the prophets and of the gospel was one and the same; and that, in the next place, it ought to be shown, with respect to Christ, in what manner He who had formerly been demonstrated to be the Word and Wisdom of God became man; it remains that we now return with all possible brevity to the subject of the Holy Spirit.