"Rationality", as in the rational way of making decisions and taking actions, is only defined up to a specific set of values, goals, or preferences (however you want to phrase things) -- those goals are a free parameter.
Hence you completely misunderstood, again, continuously making the assumption that "rationality" entails acting something like a banker, seeking some sort of personal profit in everything and caring for nothing else. Again, this just isn't true. If we take the Christ-character in the New Testament as speaking sincerely, for instance, he was acting rationally for his goals.
So again, the issue is not that one has to discard rational thought in order to take a "leap of divinity", but instead that you are assigning "more divinity" to certain goals, and therefore certain actions, than to others -- this all being contingent on your belief in the Scripture.