“In the fifteenth century, Marsilio Ficino put it as simply as possible. The mind, he said, tends to go off on its own so that it seems to have no relevance to the physical world. At the same time, the materialistic life can be so absorbing that we get caught in it and forget about spirituality. What we need, he said, is soul, in the middle, holding together mind and body, ideas and life, spirituality and the world.”