But would you say you always trust the supernatural? It does include demons
demons are “preternatural” not “supernatural”. They too are part of God’s creation, although preceding “natural” creation - and being of another nature entirely.
but you do have faith it exists
In this case it isn’t faith @Pattylt because there are more than enough contemporary descriptions and eye witnesses that are entirely credible. Demonic activity can be accompanied by signs that violate the laws of physics and nature. There are also rules that apply to these cases, so you can verify -as one more piece of proof and evidence- that what’s stated in the Gospels is verified empirically. Although, that’s not the sort of proof one should prefer to seek. (it’s a macabre accessory, not everyone appreciates it but for some it has been an important tool of conversion and proof.)
Does belief lead to faith or faith lead to belief?
Understanding can lead towards faith. You can verify through understanding the correctness of many articles of the faith - through reflection and critique. At one point you start entering a relationship with God, we are not assured everyone is called, but if seeking sincerely you should find. This might be preferable to a deathbed conversion.
It could be interesting to contrast your skepticism on some applied cases of miracles. It could be an interesting start.
What I’m reading from you is a knowledge claim based on faith that may or may not have any evidence except in your own mind?
No. In @(name removed by moderator) case I’d suspect she’s had enough psychical evidence of God’s providence. Hence it’s not a claim but an assertion, and the interior motions of the Holy Spirit follow their own methodology (especially locutions) so they can be verified through a complex set of causalities. (The same way they can be distinguished from psychosomatic symptoms that human sciences have in their inventory, and are verifiable - thus the “except in your own mind” is both misleading and provocative, since that would put away not only with mystical theology, but also with psychiatry, mental health, an all branches of psychology, including sports psychology.)
If you must know @Pattylt yes, I’ve had physical evidence of God’s intervention in my own life and family. Before you play the skeptic, please try to refute the Fátima apparitions as an exercise.