" Like most modern words, "Heresy" is used both vaguely and diversely. It is used vaguely because the modern mind is as averse to precision in ideas as it is enamored of precision in measurement. It is used diversely because, according to the man who uses it, it may represent any one of fifty things. "

― Hilaire Belloc , The Great Heresies and Survivals and New Arrivals