The Holy Spirit is God

 The Holy Spirit is God. The same revelation from God that declares Christ to be the Son of God also mentions another member of the triunity of God called the Spirit of God, or Holy Spirit. He too is equally God with the Father and the Son and he too is a distinct person.

The Holy Spirit is called "God" (Acts 5:3-4). He possesses the attributes of deity, such as omnipresence (Psalm 139:7-12) and omniscience (1 Corinthians 2:10-11). He is associated with God the Father in creation (Genesis 1:2). He is involved with other members of the Godhead in the work of redemption (John 3:5-6; Romans 8:9-17, 17-27; Titus 3:5-7).  He is associated with other members of the Trinity under the "name" of God (Matthew 28:18-20). Finally, the Holy Spirit, along with the Father and Son, in New Testament benedictions (2 Corinthians 13:14).

Not only does the Holy Spirit possess deity but he also has a differential personality. That he is a distinct person is clear in the Scripture refers to "him" with personal pronouns (John 14:26; 16:13). Second, he does things only persons can do, such as teach (John 14:26; 1 John 2:27), convict of sin (John 16:7-11), and be grieved by sin (Ephesians 4:30). Finally, the Holy Spirit has intellect (1 Corithians 12:11), feelings (Ephesians 4:30).

That the three members of the Trinity are distinct persons is clear in that each is mentioned in distinction from the others. The Son prayed to the Father (John 17). The Father spoke from heaven about the Son at his baptism (Matthew 3:15-17). Indeed, the Holy Spirit was present at the same time, revealing that they coexist. Further, the fact that they have separate titles (Father, Son, Spirit) indicate they are not one person. Also, each member of the Trinity has special functions that help us to identify them. For example, the Father planned salvation (John 3:16; Ephesians 1:4); the Son accomplished it on the cross (John 17:4; 19:30; Hebrews 1:1-2) and at the Resurrection (Romans 4:25, 1 Corinthians 15:1-6), and the Holy Spirit applies it to the lives of the believers (John 3:5; Ephesians 4:30; Titus 3:5-7). The Son submits to the Father (1 Corinthians 11:3; 15:28), and the Holy Spirit glorifes the Son (John 16:14).

GIF Link: https://giphy.com/gifs/spirit-WMy4c2ottVN4dKFh6K