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The sinner is at the heart of Christianity. No one is as competent as the sinner in matters of Christianity. No one, except a saint.

"Basic Verities, Prose and Poetry". Book by Charles Péguy. "Un Nouveau théologien" (1911), 1943.
The sinner is at the heart of Christianity. No one is as competent as the sinner in matters of Christianity. No one, except a saint.