2 Corinthians 13:14

"The grace of our Lord Jesus Christ, and the love of God," and the Father, "and the communion of the Holy Ghost, be with you all." After having united them to one other by the salutations and the kisses, he again closes his speech with prayer, with much carefulness uniting them unto God also.

Where now are they who say that because the Holy Spirit is not inserted in the beginnings of the Epistles, He is not of the same substance? For, behold, he hath now enumerated Him with the Father and Son. And besides this, one may remark, that when writing to the Colossians and saying, "Grace to you, and peace from God our Father," he was silent of the Son, and added not, as in all his Epistles, and from the Lord Jesus Christ. Is then the Son not of the same substance either, because of this? Nay, these reasonings are of extreme folly. For this very thing especially shows Him to be of the same substance, that Paul useth the expression [or not] indifferently.

And that what is here said is no conjecture, hear how he mentions Son and Spirit, and is quite silent of the Father. For, writing to the Corinthians, he says, "But ye were washed, but ye were sanctified, but ye were justified in the name of the Lord Jesus Christ, and in the Spirit of our God." (1 Corinthians 6:11) What then, tell me? were these not baptized into the Father? Then assuredly they were neither washed nor sanctified. But did they baptize them? doubtless then just as also they did baptize. How then did he not say, 'Ye are washed in the name of the Father?' Because it was indifferent in his view, at one time to make mention of this, at another of that Person; and you may observe this custom in many places of the Epistles.

Moreover, he will be found again, to put the gifts also themselves transposedly. For having said here, "The grace of Christ, and the love of God and the Father, and the communion of the Holy Ghost;" he in another place speaks of "the communion of the Son," and of "the love of the Spirit." For, "I beseech you," he says, "by the love of the Spirit." (Romans 15:30) And in his Epistle to the Corinthians, "God is faithful, by Whom ye were called into the communion of His Son." (1 Corinthians 1:9) Thus the things of the Trinity are undivided: and whereas the communion is of the Spirit, it hath been found of the Son; and whereas the grace is of the Son, it is also of the Father and of the Holy Spirit.

And I say these things, not confounding the Persons, (away with the thought!) but knowing both the individuality and distinctness of These, and the Unity of the Substance.