So the only real truths are those that have no Biblical foundation or proof? Hummmm
Then that would be proof you had the truth, if it was based on faith alone with nothing else to support it? Hummmm
If truth were based on faith alone, anything you chose to believe, as long as you had faith, would be the truth, and supported by God. Hummmmm
All the heretics and false teachers that Paul and John and all the writers warned us about, if they had simply had faith in their nonsense, then it would have been acceptable to God? Hummm
A legitimate faith must be built on a solid foundation. Small questions that arise that cast doubt on certain parts of it, can be set aside and accepted by faith until God gives you the complete answer. But to start out with nothing but faith as a belief, with no logical proof of any doctrine, is a little much to accept.
JH