Question: where does the bible talk about the holy ghost?
Answer: The term Holy Spirit appears at least 90 times in the New Testament. The sacredness of the Holy Spirit to Christians is affirmed in all three Synoptic Gospels (Matthew 12:30–32, Mark 3:28–30 and Luke 12:8–10) which proclaim that blasphemy against the Holy Spirit is the unforgivable sin.