I absolutely Love Joel Osteen's message and in spite of the many critics he has from religious associations he must be doing something right with his Church
Maybe it is just the fact that he does not speak of "fire and brimstone" that so many find attractive, since he does have the largest church in America.
I consider Joel Osteen an incredibly Hypnotic compelling speaker and often listen as he uses NLP to get his point across and Inspire people convincing them to go another round.
If you do not believe in his message perhaps you can enjoy his use of Tonality, Rhythm, cadence, Rapport mastery, metaphor, language and more as a great speaker.
Here is a little inspiration from Joel, enjoy.