You've got to honor your relationship with your audience - that they sit down because they want to be entertained. And that doesn't mean you can't provoke them and antagonize them and challenge them in the course of the entertainment as long as you keep the entertainment part of the equation alive.
The Bible is one of the greatest blessings bestowed by God on the children of men. It has God for its author salvation for its end and truth without any mixture for its matter. It is all pure.