Here's an ancient YouTube video from way back in 2011 that's making the rounds again. I ordinarily have a lot of trouble with the cliched slam poet style—"I TALK like Captain KIRK and my. Words. Have. Meaaaaaaaaninnnnnnnnnnng."—but this one is pretty watchable:

If you want the full story on the birth of Scientology, you can't do any better than Lawrence Wright's Going Clear, which is now in paperback.

(Via SF Signal.)