The Holy Spirit in the New Testament

Pentecost is this coming sunday. How should we understand the spirit in scripture? What do we make of it? Alister, like, we love the bible. We all pretend to be bible people, but you're the only person who is really a bible person. Andrew is as well, but he's not here, so why don't you kick us off? Give us the three minute overview of a biblical theology of the spirit.