relativity theory, quantum mechanics, the unification of physics, quantum gravity - the question arises: what are the limits of the scientific method? The principal tenet of rationality is that you should never stop asking questions until everything has been answered ... "A Comprehensible Universe is a thoughtful book by two authors who have professional expertise in physics and astronomy and also in theology. They are exceptionally well informed about the history of the relation between science and theology, and they maintain throughout their discussion a respect for empirical evidence and a dedication to rationality. Even though I do not agree with all of their conclusions on matters of great complexity I am impressed by the fairness of their argumentation." Abner Shimony, Professor Emeritus of Philosophy and Physics, Boston University