Who is the Holy Spirit?
Here's the answer:
The Holy Spirit is God, just like Jesus and the Father.
Each part of God (together we call them the Trinity) has different roles or jobs to do, but they’re all still the same Person—God. The Holy Spirit is not a ghost, even though another name for Him is the Holy Ghost.
In the Bible, God the Father sometimes spoke aloud to people, and so did Jesus. The Holy Spirit doesn’t speak to us in words. He works in our hearts instead. He helps to guide our thinking and give us good or bad feelings—we call them convictions—that tell us when something is a sin or when we should make a certain decision.
Anything the Bible tells us about what Jesus or the Father is like is also true of the Holy Spirit. The Holy Spirit knows everything you’re thinking and everything you do. He helps you understand the Bible when you read it, so you can understand God’s special messages for you. He helps you have faith in Jesus as your Savior and helps you trust in Him (God) each day.
"How can I get away from your Spirit? Where can I go to escape from you? If I go up to the heavens, you are there. If I lie down in the deepest parts of the earth, you are also there" (Psalm 139:7–8).
"I [Jesus] will ask the Father. And he will give you [believers] another Friend to help you and to be with you forever. The Friend is the Spirit of truth [Holy Spirit]. The world can’t accept him. That is because the world does not see him or know him. But you know him. He lives with you, and he will be in you … the Friend is the Holy Spirit. He will teach you all things. He will remind you of everything I have said to you" (John 14:16–17, 26).