Further down he raises the same objection to the Catholic Church, which teaches the same doctrine in the Catechism—oblivious to how pervasive this doctrine was in the early Christian church. Here is a list of their names who taught this doctrine:
Ignatius, Justin, Irenaeus, Theophilus, Tertullian, Clement of Alexandria, Hippolytus, Novatian, Origen, Cyprian, Methodius, Lactantius, Athanasius, Hilary of Poitiers, Gregory of Nyssa, Gregory Nazianzen, Basil, Ephraim the Syrian, Ambrose, Augustine, Jerome, Hilary of Arles, John Chrysostom, Mark the Ascetic, Aphrahat.
For their teachings see the above link. Were they all wrong, and he is right? If Augustine and Athanasius were wrong, how can Calvinism be right, which uses them as their source of theology? Augustine certainly was wrong about a lot of things; but that was not one of them.