Personal beliefs fuel The Daily Show show.
That’s what John Stewart explains in this video.
In addition to that Stephen Colbert says the show would have no feeling if they were not using their own beliefs.
I think this applies to any kind of creative process.

More videos from the same event in the full post.

The Daily Show – Stewart on substance and humor

The Daily Show – Carell and Colbert on improv

The Daily Show – Stephen Colbert on reporting without journalism background