You aren't going to find an objective standard for the Truth. That's sort of the problem with spirituality in general.
Some things are so fundamental to you as a person that you don't question them. For some people, Christ is the Truth because they can't imagine a world where that isn't the case. For others, it can be the exact oposite.
I would say, even though it might sound a bit dis-respectful, that part of being a human is that you don't WANT this thing we call 'reality' to be a formula for how to think. Some things can remain paradoxal.