After the Spirit’s descent, Peter gives the first Christian sermon in Acts 2:14-41. Preaching was what God used to grow the church. On the surface preaching seems a bit foolish, but God has chosen the proclamation of his Word to be at the center of his work in and through the Church. Peter (who had been cowardly afraid of some middle-school aged girls only 50 days earlier) stands up with courage to boldly preach to everyone on that Pentecost morning. He explained everything that was going on from Scripture, how it was all about Jesus and how we all need him!