Acts 2: Pentecost

Pentecost is regarded as the "birthday" of the Church!  Something about the disciples fundamentally changed on that day.  With the coming of the Holy Spirit, poured out on them in power, they received not only spiritual gifts (such as speaking in tongues) but were also empowered with courage and boldness.  Gone were the half-hearted followers who deserted/denied Jesus a scant 50 days earlier.  In their place were the (literally) on-fire men and women who would turn the world upside-down!  Peter, who had spent Good Friday shrugging and asking, "Who's Jesus?  Never heard of Him," rides out Pentecost telling the crowd exactly who this Jesus is!  Looking for a clue to the success of the early church?  It starts with the Holy Spirit on Pentecost!