The demons generally produce in us the opposite of what has just been said. For when they take possession of the soul and extinguish the light of the mind, then there is no longer in us poor wretches either sobriety, or discernment, or self-knowledge or shame; but there is indifference, lack of perception, want of discernment and blindness.
What has just been said is known very vividly by those who have subdued their lust in order to become chaste, who have curbed their freedom of speech and have changed from shamelessness to modesty. They know how after the sobering of the mind, after the ending of its blindness, or rather its maiming, they are inwardly ashamed of themselves for what they said and did before when they were living in blindness.
—St. John Climacus, The Ladder of Divine Ascent