“For the secularist, the belief that everything that exists is physical is based on faith in part; it cannot be fully proven by rational argument or by appeal to the evidence. In particular, the secularist has not proved that the human mind (consciousness, thoughts, ideas, etc.) is physical. Of course, he might believe that it is physical or hope to prove it one day (a misguided hope, I hold), but right now he believes this on faith. He might claim that it is a rational faith; whatever about this point, it is still a belief based partly on faith.”
Why Politics Needs Religion: The Place of Religious Arguments in the Public Square (pp. 119-120). Kindle Edition.