Book excerpt: Light is the key to the deepest of mysteries, and the bridge that connects science and spirituality. When Christian faith is understood in terms of the scientific properties and behaviors of light, not only do perceived conflicts between science and spirituality disappear, but there exists a synergy between them that supports and enriches both. The key to understanding our place and purpose in the universe is the property of light known in physics as the "complementarity principle," in which light exists as waves until it is observed by humans, upon which it instantly manifests as physical reality. This dual nature of light defines dual realities - the spiritual and physical realities. Visionaries and prophets throughout history and from widely diverse backgrounds, as well as many individuals who have had so-called near death experiences, have consistently reported experiencing God as Light - Light that is qualitatively and quantitatively different from the light we ordinarily see. Furthermore, the "tunnel" often seen in the near death experience is the same phenomenon as the so-called "spiritual eye" or "gate of heaven" of the visionary experience. It's a phenomenon that was predicted by Einstein's theories 100 years ago. In addition, re-examining the biblical creation story in terms of the Light of Christ and the complementarity principle, it becomes clear that the "fall" of man from the presence of God was a quantum event in which his conscious awareness switched from God to the physical world. It also becomes clear that the first chapter of Genesis is about the creation of the universe, not about our planet. The apparent anachronisms in the Genesis story then disappear, details of the physical creation as distinct from the spiritual come into sharper focus, and the creation story is seen to be in complete harmony with modern science.