Images have always made a difference. Art as a carrier of religious, cultic or collective emotions has an important role to play in the transformation of the world. To be tainted by the stain of cult or idolatry, or to enable life and artworks in the first place, through the incarnation of ideas and the transcendent - this is the tension encapsulated in debate over the power of images to this day. They evoke horror and the sacred, and may also...