Greetings in that Divine and Most Precious Name of Our Lord and Savior Jesus Christ!
I just don't buy the argument that Jesus Christ doesn't exist outside of faith.
Nothing actually exists as we think
or assume to know it aside from faith.
But couldn't I say believing in Mithras is a matter of faith though? I mean that can apply to anything.
See, now my brother, you've stumbled into some deep realms of Existentialism
This is precisely the logical fault in the scholastic approach to theology, the rational mind simply can't accept some of the facts of reality, we are pattern seeking animals, it is much easier to believe in the truth of the symbols and patters we've constructed in our minds rather then experience the underlying mystic reality which they represent. Even what we learn in physics tells us that what we perceive with our senses isn't really an accurate portrait of reality as it exists, but how our brains can make sense of all the data. Our collective memory of the past is similarly complex, and is as much a symbol of what we think about the past as any attempt at an accurate reconstruction.