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The human race experienced on a grand scale what we experience on a small scale, namely the struggle between spirit and flesh, reason and passion. God made us one, but sin divided us, and since then there have been two men within us, Cain and Abel, the first carnal and the second spiritual, one earthly and the other heavenly, one of man and the other of God. (vol. I, p. 98)
— RENÉ FRANÇOIS ROHRBACHER