What is the difference between the Holy Spirit and the Holy Ghost?
Modern English translations describe the third person of the triune God as “the Holy Spirit.” However, the 1611 King James Version used the term “Holy Ghost” some 90 times and “Holy Spirit” seven times. The reason the KJV uses both terms is that it was translated by several teams and, apparently, they translated the term differently.
In the 17th century, the word ghost meant an immaterial being. When someone died, their immaterial part, the spirit or ghost of the deceased person, continued to live on. Maybe you’ve heard the phrase “give up the ghost,” which carries the same meaning. In modern times, the word “ghost” has come to mean an apparition. Thus, today, the better translation of the original Greek word pneuma is Spirit, not Ghost.
All that to say, there is no difference between the Holy Spirit and the Holy Ghost. He is the third person of the triune God, the Comforter sent by the Lord Jesus (John 14:16; 15:26; 16:7) who indwells all Jesus followers forever (John 14:17). He testifies of and glorifies the Lord Jesus, pointing to the Messiah rather than Himself (John 15:27; 16:14). The Holy Spirit convicts the world of sin, showing lost people their need for redemption through the Lord Jesus (John 16:8–11). He regenerates (Titus 3:5), indwells (Rom. 8:9; 1 Cor. 3:16; 6:19), baptizes (1 Cor. 12:13), and seals all Jesus followers (Eph. 1:13; 4:30), assuring their security until their day of redemption.