[xzins]

Because everything they say is based on themselves as their own authority.

Why should I listen to them? Might as well listen to myself.

[TBP]

Listening to yourself -- or rather, to your true self, the Divine within -- is eaxctly what New Thought asks you to do. And follow it. The movement provides support and techniques for doing that effectively.

[TBP]

"Because everything they say is based on themselves as their own authority."

If you believe this, then I don't think you understand it.