make mutual sense, science and religion have things to say to each other. The rest of this book will be an exploration of what this necessary conversation between science and religion is like. Let me draw a moral from science that can be of help to theology in its search for understanding. I have already referred to the astonishing and perplexing way in which light has been found to behave, that is, sometimes like waves, and sometimes like particles. A wave is a spread-out flappy thing; particles