I kept thinking of the ancient Roman pictures of the keeper of doorways, Janus, the god of beginnings. He has two faces, one looking to the past, the other to the future… The Cambridge Platonists occupy an important middle ground in the history of ideas. They understood the power of modern science… and yet they worked in allegiance with an important Platonic philosophical and religious heritage spanning ancient, medieval, and Renaissance philosophy. They forged an extraordinary synthesis designed to incorporate modern science while retaining what they believed to be the best of Greek and Hebrew wisdom. Like Janus, the Cambridge Platonists invite us to adopt that double vision of looking both to the past and to the future… Some artists, scientists, and religious practitioners complain that philosophy of art, science, and religion utilize misleading pictures of the way art, science, and religion are actually practiced. For better or for worse, the Cambridge Platonists were philosophers of religion and, at the same time, committed to the practice of religion. They practiced the very thing they were studying and philosophically reflecting on, and in that respect the Cambridge Platonists were like artists or scientists working out a philosophy of art or science. They also thereby raise questions about the roles of detachment and religious commitment in the course of philosophical inquiry.