I. Two kinds of witnesses to God's works - doubters that mock, and those that are amazed and seek meaning. II. Peter reveals the pouring out of the Spirit at Pentecost was fulfillment of Joel 2:28.III. The "last days " began with Christ, and will end with the day of the Lord. IV. We are in the last days - during this Church Age whosoever calls on the name of the Lord is saved. V. Christ resurrection also delivered the OT saints to paradise from Abraham's bosom.