enim differentia comitatur qui uel augent uel minuunt, ut Arriani qui
gradibus meritorum trinitatem uariantes distrahunt atque in pluralitatem
diducunt. Principium enim pluralitatis alteritas est; praeter alteritatem
enim nec pluralitas quid sit intellegi potest. Trium namque rerum uel
quotlibet tum genere tum specie tum numero diuersitas constat; quotiens
enim idem dicitur, totiens diuersum etiam praedicatur. Idem uero dicitur
tribus modis: aut genere ut idem homo quod equus, quia his idem genus ut
animal; uel specie ut idem Cato quod Cicero, quia eadem species ut homo;
uel numero ut Tullius et Cicero, quia unus est numero. Quare diuersum etiam
uel genere uel specie uel numero dicitur. Sed numero differentiam
accidentium uarietas facit. Nam tres homines neque genere neque specie sed
suis accidentibus distant; nam uel si animo cuncta ab his accidentia
separemus, tamen locus cunctis diuersus est quem unum fingere nullo modo
possumus; duo enim corpora unum locum non obtinebunt, qui est accidens.
Atque ideo sunt numero plures, quoniam accidentibus plures fiunt.




I.

There are many who claim as theirs the dignity of the Christian
religion; but that form of faith is valid and only valid which, both on
account of the universal character of the rules and doctrines affirming
its authority, and because the worship in which they are expressed has
spread throughout the world, is called catholic or universal. The belief
of this religion concerning the Unity of the Trinity is as follows: the
Father is God, the Son is God, the Holy Spirit is God. Therefore Father,
Son, and Holy Spirit are one God, not three Gods. The principle of this
union is absence of difference[10]: difference cannot be avoided by