The doctrine that man’s sexual capacity belongs to a lower or animal part of
his nature . . . is the necessary consequence of the doctrine that man is not
an integrated entity, but a being torn apart by two opposite, antagonistic,
irreconcilable elements: his body, which is of this earth, and his soul, which
is of another, supernatural realm. According to that doctrine, man’s sexual
capacity—regardless of how it is exercised or motivated, not merely its
abuses, not unfastidious indulgence or promiscuity, but the capacity as
such—is sinful or depraved.