We have lost faith and turned our backs on reason. We believe the emotions are rational because reason is too difficult. Yet to call the emotions rational would be a little too dishonest, and we cannot call them irrational without shame, hence "non-rational".
But if our lives are non-rational, they are also irrational, for there is no truth in feelings. To trust one's feelings means to give more obedience to one's grandparents than to the gods which are in us: our reason and our experience.