The Great Catechism 19

Nevertheless, since neither those who take the Greek view, nor yet the leaders of Jewish opinions, are willing to make such things the proofs of that Divine manifestation, it may be as well, as regards these demurrers to our statement, to treat more particularly the reason by virtue of which the Divine nature is combined with ours, saving, as it does, humanity by means of itself, and not working out its proposed design by means of a mere command. With what, then, must we begin, so as to conduct our thinking by a logical sequence to the proposed conclusion? What but this, viz. with a succinct detail of the notions that can religiously be entertained of God?