Rationality is culturally relative, reason for one is unreason for another

If we stray into meta psychics, then we are outside of rational parameters, as we are with people who 'hear' the word of God

One must  distinguish empirical rationalism from moral rationalism. 

Empirical rationalism claims that it is an empirical fact that moral judgment in humans is a kind of rational judgment; i.e. our moral judgments derive from our rational faculties or capacities.

Conceptual Rationalism states that it is a conceptual truth that people who make moral judgments are motivated by them. That is, if you understand what morality requires you will want to do it (because it is the rational thing to do). 

However one might embrace the fact that rationality is culturally relative ie pre the Enlightenment.

Yet reason for one is unreason for another.