21. We have always to beware of the vices of particular perversions, and countenance no opportunity for delusion. For many heretics say that the Son is like the Father in divinity in order to support the theory that in virtue of this similarity the Son is the same Person as the Father: for this undivided similarity appears to countenance a belief in a single monad. For what does not differ in kind seems to retain identity of nature.
21. Cavetur in omnibus adversum singularum per 0497A versitatum vitia, neque occasio fraudis admittitur. Plures enim haereticorum idcirco similem secundum divinitatem esse Patri Filium dicunt, ut per similitudinis proprietatem eumdem Patrem esse quem Filium confirment: quia indiscreta similitudo admittere videatur unici ac singularis occasionem. Quod enim non dissentit in genere, id videtur in unione manere naturae.