It was no flock of sheep the Christian shepherd was leading, but a herd of bulls and tigers, of terrible ideals and devouring doctrines, each one of them strong enough to turn to a false religion and lay waste the world. Remember that the Church went in specifically for dangerous ideas; she was a lion tamer. The idea of birth through a Holy Spirit, of the death of a divine being, of the forgiveness of sins, or the fulfillment of prophecies, are ideas which, anyone can see, need but a touch to turn them into something blasphemous or ferocious.
–G.K. Chesterton, Orthodoxy (p. 92)