Peter, led by the Holy Spirit immediately began to speak. Seminary students are taught that there are three basic rules for public address: stand up, speak up, then shut up. Peter never got to the shut up. Before he reached the conclusion and gave the altar call, a wonderful thing happened. That day, over 3000 people responded to the message, it is an amazing thing.

It occurred because Peter stated the truth. That is all his message was, simply an explanation of reality. That is what the preaching of the gospel is. It is an explanation of what things are really like. That is what Peter does. His message consists of three things: An explanation of the event, the phenomenon of tongues; a declaration concerning Jesus; and an application for all who believed.