"Calvin was a not a Trinitarian, but a Bini-tarian!" "The Protestant Reformer Calvin rejected the Catholic doctrine of the Trinity!" "To Calvin, only the Father and the Son were both Auto-Theos (or 'God Himself') — but not also the Holy Spirit!"
Worst of all. "The pioneer Presbyterian Reformer John Calvin — just like the later Calvinistic Westminster Confession closely based upon his teaching — was very woefully inadequate in his doctrine of the Holy Spirit!"
False views such as the above, have had their impact on the old (Northern) Presbyterian Church in the United States of America. Consequently, in 1903, it added its own following extra chapter ("XXXIV:I-IV" alias '34:1-4') — a chapter specifically on 'The Holy Spirit' — right at the very end of the historic and till then unsullied Westminster Confession of Faith.
Once may read this extra chapter in The Constitution of the Presbyterian Church in the United States of America — published by the PCUSA’s Presbyterian Board of Publication, Philadelphia, 1908, at pp. 138ff. There, this new 1903 chapter reads as follows:
"I. The Holy Spirit, the third person in the Trinity, proceeding from the Father and the Son, of the same substance and equal in power and glory, is, together with the Father and the Son, to be believed in, loved, obeyed, and worshiped throughout all ages. II Cor. 13:14; John 15:26; Matt. 28:19; 3:16-7; Luke 1:35; Eph. 4:30; Heb. 1:29; I Cor. 10:10-1; Rev. 22:17; Eph. 2:18-20,22; John 14:26; 16:7; Gal. 4:6; Acts 5:3-4; Acts 16:6-7; Mark 3:29; Rom. 8:26-7; I John 2:20-7."
"II. He is the Lord and Giver of life, everywhere present in nature, and is the source of all good thoughts, pure desires, and holy counsels in men. By Him the Prophets were moved to speak the Word of God, and all writers of the Holy Scriptures inspired to record infallibly the mind and will of God. The dispensation of the Gospel is especially committed to Him. He prepares the way for it, accompanies it with His persuasive power, and urges its message upon the reason and conscience of men, so that they who reject its merciful offer are not only without excuse but are also guilty of resisting the Holy Spirit. Eph. 4:30; 5:9; Gen. 1:2; John 3:5; Acts 2:1-21; Gal. 5:22-5; John 16:8-11; II Pet. 1:21; II Tim. 3:16; I Cor. 2:10; I Pet. 1:11; John 16:13-5; Acts 7:51; I Th. 5:19; Eph. 4:30; Ps. 104:30."
"III. The Holy Spirit, Whom the Father is ever willing to give to all who ask Him, is the only efficient agent in the application of redemption. He convicts men of sin, moves them to repentance, regenerates them by His grace, and persuades and enables them to embrace Jesus Christ by faith. He unites all believers to Christ, dwells in them as their Comforter and Sanctifier, gives to them the spirit of Adoption and Prayer, and performs all those gracious offices by which they are sanctified and sealed unto the day of redemption. John 3:1-8; Acts 2:38; Luke 11:13; I Cor. 12:3; John 7:37-9; 16:13; 16:7-11; Rev. 22:17; Tit. 3:5-7; II Th. 2:13; Gal. 4:6; I John 4:2; Rom. 8:14,17,26-7; Eph. 4:30; I Cor. 2:13-4."
"IV. By the indwelling of the Holy Spirit, all believers, being vitally united to Christ Who is the Head, are thus united one to another in the Church which is His body. He calls and anoints ministers for their holy office, qualifies all other officers in the Church for their special work, and imparts various gifts and graces to its members. He gives efficacy to the Word, and to the ordinances of the Gospel. By Him the Church will be preserved, increased until it shall cover the earth, purified, and at last made perfectly holy in the presence of God. Eph. 2:14-8; 4:1-6; 5:18; Acts 2:4; 13:2; I Cor. 12; II Pet. 1:19-21; I Th. 1:5-6; John 20:22-3; Matt. 28:19-20."