The Holy Spirit is one of three everlasting personalities of the Godhead, and as such He possesses all attributes of Deity (cf. Gen. 1:2,26; 1 Cor. 2:11).
The Holy Spirit moved the approximately forty men to write the Bible, breathing out God’s Word so that each writer, though equipped with free will and distinct personality, was guided completely, word for word, in the written message of Scripture (2 Tim. 3:16-17; 2 Pet. 1:21).
The Holy Spirit has never directly operated upon the heart of man to bring about conversion, and thus He does not do so today (cf. Acts 2:40; 11:14).
The Holy Spirit has never overtaken an individual’s will or overrode one’s free choice, and that is true today, too (Rev. 22:17).
The Holy Spirit does not communicate Divine Revelation apart from Scripture today, as such would either be contradictory or superfluous in light of the written Word (2 Tim. 3:17; Jude 3).
The Holy Spirit provided miraculous gifts to the apostles to confirm the men and the message (Heb. 2:4). Once that message had been faithfully delivered, there was no longer a need for miraculous evidence (John 20:30-21; Jude 3).
The Holy Spirit empowered first-century Christians with miraculous gifts, but these were to pass with the completion of the written Word. Having thus the completed Word, there are no longer miraculous gifts (1 Cor. 13:8-13; Eph. 4:11-13).
The Holy Spirit indwells the Christian. Faithful Christians may be divided as to how, with some saying He does so representatively (through the Word only) and others saying He does so personally and non-miraculously, but either view can be harmonized with Bible truth (Rom. 8:11; 1 Cor. 3:16; Eph. 3:16; etc.).
The only instances of Holy Spirit baptism were of the apostles (Acts 1:5) and Cornelius’ household (Acts 10:47). The one baptism of Ephesians 4:5 is water baptism, of which there are many examples in the New Testament (Acts 8:38; 1 Pet. 3:21) – Neal Pollard