he's a bible teacher and radio broadcaster as well as Professor of Preaching at Reformed Theological Seminary in Orlando, Florida.
Unlike a lot of "theologians" he doesn't shove Calvin down the throats of his listeners. His approach is simple, he tries to show them Christ and then when they are ready for it, he gives them more teaching. I have heard him on many occasions defend the Reformed faith, but he is not ugly about it or arrogant.

Σεσυς ις Λορδ