The Bible has recorded numerous dramatic examples of God's call to service. One of the most dramatic is Isaiah's call to be His prophet to Judah in the final year of King Uzziah's reign. Most of us will never experience an event quite like this, but there are still good principles we can learn about how to recognize and answer the call of God. An expository sermon from Isa. 6:1-13; sermon begins at about 20:40.