Nature worship producing the unnatural.

In the Roman Empire, long before the end, we find nature-worship inevitably producing things that are against nature. Cases like that of Nero have passed into a proverb, when Sadism sat on a throne brazen in the broad daylight. But the truth I mean is something much more subtle and universal than a conventional catalogue of atrocities. What had happened to the human imagination, as a whole, was that the whole world was coloured by dangerous and rapidly deteriorating passions; by natural passions becoming unnatural passions. Thus the effect of treating sex as only one innocent natural thing was that every other innocent natural thing became soaked and sodden with sex. For sex cannot be admitted to a mere equality among elementary emotions or experiences like eating and sleeping. The moment sex ceases to be a servant it becomes a tyrant. There is something dangerous and disproportionate in its place in human nature, for whatever reason; and it does really need a special purification and dedication. The modern talk about sex being free like any other sense, about the body being beautiful like any tree or flower, is either a description of the Garden of Eden or a piece of thoroughly bad psychology, of which the world grew weary two thousand years ago.

G. W. Chesterton, in St. Francis of Assisi.