Kindbud 420:
They can't give you anything because they don't have anything to give you except "faith".
It's the old "God said it, I believe it, that settles it" bumpersticker.
This is what the Bible says about public (school) prayer and in my interpretation, evangelical preachers as well. This is red letter text (Jesus speaking):
Matthew 6:5-8
5"And when thou prayest, thou shalt not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward. 6But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly."
I'm pretty sure I must be misinterpreting this though, as it seems to fly in the face of what most evangelical Christians practice.