"THE real difficulty which confronts everybody, and which especially confronts doctors, is that the extraordinary position of man in the physical universe makes it practically impossible to treat him in either one direction or the other in a purely physical way. Man is an exception, whatever else he is. If he is not the image of God, then he is a disease of the dust. If it is not true that a divine being fell, then we can only say that one of the animals went entirely off its head. In neither case can we really argue very much from the body of man simply considered as the body of an innocent and healthy animal. His body has got too much mixed up with his soul, as we see in the supreme instance of sex. It may be worth while uttering the warning to wealthy philanthropists and idealists that this argument from the animal should not be thoughtlessly used, even against the atrocious evils of excess; it is an argument that proves too little or too much."
~G.K. Chesterton: All Things Considered.