We know the Holy Spirit is God because the Bible establishes Him as the Third Person of the Trinity, equal and coexistent with the Father and the Son.
The deity of the Holy Spirit is grounded in the understanding of the Trinity, where the Father, Son, and Holy Spirit coexist in perfect unity and equality. Scripture affirms the work of the Holy Spirit as divine, particularly in His role in creation, revelation, and salvation. In Nehemiah 9:20, the act of giving the Spirit to instruct signifies His divine authority and power. Additionally, when believers are brought to a place of reliance on the Spirit, they gain evidence of His divine presence within their lives, reflecting the reality of His nature as God. Therefore, recognizing the Holy Spirit's actions and His impact on our faith validates His divine identity.
Scripture References:
Nehemiah 9:20, Matthew 28:19, Titus 3:5
Commentary