Reason is a harmonising, controlling force rather than a creative one.
So far as I can remember, there is not one word in the Gospels in praise of intelligence.
Remember your humanity, and forget the rest.
Faith: a firm belief for which there is no evidence.
Not to be absolutely certain is, I think, one of the essential things in rationality.
Aristotle and Plato considered Greeks so innately superior to barbarians that slavery is justified so long as the master is Greek and the slave barbarian.