The Promise of the Father
The Bible is a book of promises, each of which is guaranteed by the unchanging nature of God (2 Corinthians 1:20). One precious promise is that He will send someone to live forever with those who trust Jesus as Savior. And not just any individual, but the very Spirit of God Himself is pledged to believers. Scripture teaches that He is the third person of the Trinity, or Godhead, of which the other members are the Father and the Son.
The triune nature of God is clear in a number of Bible passages. Genesis 1:1-2, for instance, identifies both the Father and the Spirit as active participants in Creation. The New Testament later reveals that Jesus Christ was likewise present when the world was being made (Colossians 1:16). Another example is seen in the Lord's promise to the disciples the night before His crucifixion. He said He would ask His Father to send "another Comforter" — the Holy Spirit (John 14:16, 26 KJV). Then after the Resurrection, Jesus told His followers to make disciples and baptize in the name of the Trinity (Matthew 28:19).
Based on biblical truth, we can know for sure that the Spirit is fully God, just like the Father and the Son. The Scriptures teach that we can intimately know the Father and Jesus; the same holds true for the third person of the Trinity. Because of the Spirit's importance, Jesus spent much time talking about Him with the disciples.
Do you know the Spirit as well as you do the Father and Son? If not, spend time studying Scripture to gain understanding of His place in your life.