Scientism as a Belief System
It may seem strange to talk about science in these terms. Science is supposed to be neutral and objective and free from beliefs. The role of scientists is to investigate the structure and laws of natural phenomena and to conduct research and advance knowledge. Science is ideally an open-minded and open-ended process, where theories are continually tested and updated based on evidence.
...science has become associated with a particular worldview, which is often maintained and defended in a similar way to a religion.
This is the worldview of materialism, which holds that matter is the primary thing in the universe, and that anything that appears to be non-physical—such as the mind, our thoughts, consciousness, or even life itself—is physical in origin, or can be explained in physical terms.
Materialism holds that human beings are just biological machines and that the only purpose of our lives is to survive and reproduce. It holds that anomalous phenomena, such as spiritual experiences, near-death experiences, or psi phenomena, are brain-generated illusions or can be explained in terms of fraud or coincidence. Materialists are particularly opposed to psi phenomena—like telepathy or precognition—which they see as anathema to science, a throwback to a pre-enlightenment world of magic.