Before Jesus took off, he mentioned that he was going to send a helper to guide his followers.  He was talking about The Holy Spirit.  Along with "God the Father" and Jesus ("God the Son"), the Holy Spirit is actually the third part of God.  Some people call him the Holy Ghost, but he's not meant to be scary.  But why did Jesus send him?  What does the Bible reveal about his purpose in the first century and today?  Interested?  Give this one a go!