Well, faith is irrational by definition, kat - if it weren't, it would be a conclusion from replicable data. The whole point of faith is belief without knowledge. If it were from knowledge, it wouldn't be belief.

As a separate item, the problem with "person who" arguments (as in, you say that height and weight are correlated, well I know a Person Who is tall and skinny so you must be wrong) is that they ignore statistics - there are indeed tall thin people, and short fat people, but that doesn't change the fact that height and weight are correlated. So sure, there are people who "mind over matter" themselves into amazing things - think of old ladies picking cars up off of their little grandkids, and other oddities. And no, calling it "mind" is not just labelling about explaining. Actually, quite a lot is known about mind these days, and we're learning more and more from neuropsychology.

Sure, there are cures that defy current explanation. These are not, however, evidence of the supernatural. Just because what we know now of the natural world as learned through science can't explain something does not mean that the answer has to be supernatural. That's the argument the Intelligent Design people have tried, and it doesn't hold water.