The goal of the iconoclasts was to restore the church to the strict opposition to images in worship that they believed characterized at the least some parts of the early church. Theologically, one aspect of the debate, as with most in Christian theology at the time, revolved around the two natures of Jesus. Iconoclasts believed that icons could not represent both the divine and the human natures of the Messiah at the same time, but only separately. Because an icon which depicted Jesus as purely physical would be Nestorianism, and one which showed Him as both human and divine would not be able to do so without confusing the two natures into one mixed nature, which was Monophysitism, all icons were thus heretical. Leo III did preach a series of sermons in which he drew attention to the excessive behaviour of the iconodules, which Leo III stated was in direct opposition to Mosaic Law as shown in the Second Commandment. However, no detailed writings setting out iconoclast arguments have survived; we have only brief quotations and references in the writings of the iconodules and the nature of Biblical law in Christianity has always been in dispute.