I suppose you could look at it a "evangelizing, prosletysing". But what are you listen to when you hear a fired-up preacher? Someone with a conviction that what he believes will change the hearts of man, and by extension, the world. The man behind the pulpit, if he is worth his weight, is burdened and shows passion. Even if you don't agree with the message, you've got to admire someone who is at least trying to change the world. Sermons can be shouted at any pulpit, even at the secular level. It is the art of persuasion to make the other person think outside of his own paradigm. And it does take a tremendous amount of courage to put oneself out on the limb for people to cut off. On the other hand, there is a fine line between passion and pomp. One must not shout too loudly that you can't hear the other speak.