The world won't follow Christ as the crucified One. At the death of Christ, the whole orderly system down here got stamped by God as under judgment, and responsible for the death of Christ. By the cross, the world is crucified unto me, and I unto the world. Nothing is so important as for Christians to take the place they ought to be in, of entire separation from what God, in the Scriptures, calls "the world." As to our bodies, we are to take care of them in order to serve the Lord more, but there is such a thing as the lust of the flesh and of the mind, to be watched against.