That it may appear more clear than the light that the divinity of the Father, the Son, and the Holy Spirit is one, see it proved by the Evangelist St. John, who writes thus: there are three which bear record in heaven, the Father, the Word, and the Holy Spirit, and these Three are one.

In his Horae Biblicae (1817) Charles Butler says "The opposers of The Verse remark, 1st, That the unanimous testimony of the four hundred bishops, by no means proves that The Verse was in all their copies, and 2dly, That, as no dispute took place, but the conference was broken up immediately, the sullen silence of the Arians, is merely an invention of Mr. Travis." Butler responded with 12 points to this argument of the opposers:

1. The catholic bishops were summoned to a conference; so that they expected, -and it certainly was highly probable,-that their tenets, and the proofs they should adduce of them, would be strongly attacked:
2. This circumstance must have made them very cautious of what they inserted in their proposed confession:
3. Particularly, as all power was in the hands of their angry and watchful adversaries:
4. Of course, though they might, and from the nature of the case, must have inserted in the confession, some things, at which they knew the Arians would cavil, they would not have inserted in it anything, which, by merely asking a plain question, the Arian could prove to be a palpable falsehood:
5. Now, -if the Arians could, with truth, have said, to the catholic bishops, what the present opposers of The Verse say, --The Verse is in no Greek copy, --it is in few only of your own copies:--Can you even assert the contrary? What could the catholic bishops have replied? --If we are to believe the adversaries of The Verse, the bishops could hold out no Greek copy, --no ancient Latin copy, --no ancient father,--where The Verse was to be found:
6. On this supposition, therefore, --instantly and on the very spot, the Arians could have shewn the spuriousness of The Verse, and have convicted the bishops of a palpable falsehood:
7. And this, at a time and in a situation, when the eyes of all the christian world were upon them:
8. Now, --is it probable the catholic bishops would have exposed themselves to such immediate and indelible infamy?
9. Particularly, as it was volunteering it: --for their producing The Verse was a mere voluntary act:--their cause did not depend on it; long treatises had been written by the ancient defenders of the Trinity, in which The Verse had not been mentioned:
10. Consequently,--when the catholic bishops produced The Verse, they could have no fear that any such proof positive of its spuriousness could be dashed upon them:
11. Therefore,--they knew, either that The Verse could not be attacked, --or that, if attacked, they could produce Greek copies, ancient Latin copies, and ancient fathers in its defense.
12. It is observable that the greatest part of the catholic prelates who assisted at this conference, suffered, for their steady adherence to their faith, the severest persecution.--In the language of Mr. Gibbon (ch. 38.),

    "Three hundred and two of them were banished to different parts of Africa, exposed to the insults of their enemies, and carefully deprived of all the temporal and spiritual comforts of life. Gundamund, the nephew and immediate successor of Huneric, appeared to emulate and even to surpass the cruelty of his uncle. At length he relented and recalled the bishops. Thrasimund, his brother and immediate successor, prohibited by a law, any episcopal ordination; and their disobedience was punished by a second exile of two hundred and twenty bishops into Sardinia, where they languished fifteen years."

    Surely it is improbable, that men who could undergo such persecutions and sufferings for their belief of the consubstantiality of the Son, would introduce a spurious verse into His word.