Now there are two sorts of petrifaction: the one, a petrifaction of the understanding ; the other, of the sense of shame, when a person hath obstinately set himself not to assent to evident truths, nor to quit the defence of contradictions. We all dread a bodily mortification; and would make use of every contrivance to avoid it: but none of us is troubled about a mortification of the soul. And yet, indeed, even with regard to the soul, when a person is so affected as not to apprehend or understand anything, we think him in a sad condition: but where the sense of shame and modesty is under an absolute mortification, we go so far as even to call this, strength of mind.
EPICTETUS. DISCOURSES. I. 5, 1-2.