Rob, the problem you are talking about is true for ALL mental experiences and states of mind. . . you have to take what people say, then see if you can find neural or physiological correlates. But if you test a lot of people, and those who SAY they have feelings of faith tend toward certain types of brain function which those who say they do not have those feelings, then you can reasonably infer that their feelings are real.
And faith is NOT religion. Faith is a state of suspension of disbelief, combined with a sense that some entity or principle maintains rightness in the universe. Religions require it, but it is not religion.
And faith is NOT religion. Faith is a state of suspension of disbelief, combined with a sense that some entity or principle maintains rightness in the universe. Religions require it, but it is not religion.