But what is written in the NT about Jesus is self-contradcitory. "Other sources" - really what do we learn about the person and teachings of Jesus form other sources?
You mean some details on the events surrounding him? Big deal. Told from different perspectives, different people, interviews (Luke's account)... the details are bound to have differences. That is only a problem for someone who thinks the bible is the inerrant, infallable word of God. Again, no reason to believe that it is. None at all. Not even 'biblical'.
Contradictions in His nature though? I don't see them, even in the NT.
Other sources help show that a man named Yeshua (or whatever pronunciation is used), son of Yoseph, e x isted. Sometimes another account (gnostics perhaps) can give us a deeper, rounder, view of Him. Sometimes they can just throw in confusion.
No you don't know a single fact about Jesus because of supernatural revelation. If you wrote down every single thing you claim to know about Jesus life and teachings every single word would be bsed on the bible - the book you don't trust.
You may think what you like, (and you have to think like that because you do not believe); but I know what I know. Sometimes understanding given to me also shows that something written is trustworthy. But I don't receive understanding to prove what is true or not in the bible. I receive understanding... to understand. To know and share truth. To help, if I can.
Peace,
Tammy