Peacocke, A, ‘The Sound of Sheer Silence: How Does God Communicate with Humanity?’ in Neuroscience and the Person: Scientific Perspectives on Divine Action, ed. by RJ Russell et al (Vatican City and Berkeley, Ca.: Vatican Observatory and CTNS, 1999). Brain function may also be of this kind - our mental life being the highest emergent property (see the concept of emergence) of the brains in our bodies.