Science is a formalized procedure for making sense of the world by studying its material properties, perceived through the awareness of the senses, albeit senses heightened by modern marvels such as the electron microscope, the Hubble Space Telescope or the Chandra X-Ray Observatory. Scientism (or scientific materialism), on the other hand, adds to science a statement of faith: The universe is only material. Moreover, given the spectacular successes of science over the past three centuries, it is more than fair to acknowledge that science represents a powerful way to learn about the world. But scientism ups the ante: Science is the best (or only) way to make sense of the world. In short, scientism is to science what fundamentalism is to religion: cocksure and inflexible.