17. I have dwelt upon these facts because the heretics falsely maintain that the union between Father and Son is one of will only, and make use of the example of our own union with God, as though we were united to the Son and through the Son to the Father by mere obedience and a devout will, and none of the natural verity of communion were vouchsafed us through the sacrament of the Body and Blood; although the glory of the Son bestowed upon us through the Son abiding in us after the flesh, while we are united in Him corporeally and inseparably, bids us preach the mystery of the true and natural unity.
17. Epilogus. Haec autem idcirco a nobis commemorata sunt, quia voluntatis tantum inter Patrem et Filium unitatem haeretici mentientes, unitatis nostrae 0249B ad Deum utebantur exemplo, tamquam nobis ad Filium, et per Filium ad Patrem, obsequio tantum ac voluntate religionis unitis, nulla per sacramentum carnis et sanguinis naturalis communionis proprietas indulgeretur: cum et per honorem nobis datum Filii, et per manentem in nobis carnaliter Filium, et in eo nobis corporaliter et inseparabiliter unitis, mysterium verae ac naturalis unitatis sit praedicandum.