Modern science seems to be based on an unwavering commitment to naturalism and materialism. Naturalism is the doctrine that nature is all there is. According to naturalism, there are neither miracles nor supernatural forces. Therefore reports of the supernatural can only be interpreted naturalistically. Materialism is the belief that material reality is the only reality. There is no separately existing mental or spiritual reality. Of course, people are conscious and have thoughts and perhaps even spiritual experiences, but this can be understood as only the workings of the neurons in their material brains. The mental and spiritual are presumed to be mere epiphenomena of the material.