"Be wary of false preachers who smile a lot, dripping with practiced sincerity. Chances are they are out to rip you off some way or other. Don't be impressed with charisma; look for character.
Who preachers are is the main thing, not what they say. A genuine leader will never exploit your emotions or your pocketbook. These diseased trees with their bad apples are going to be chopped down and burned.