We, then, who assign the best part of the night to wakefulness, must by no manner of means sleep by day; and fits of uselessness, and napping and stretching one’s self, and yawning, are manifestations of frivolous uneasiness of soul. And in addition to all, we must know this, that the need of sleep is not in the soul. For it is ceaselessly active. But the body is relieved by being resigned to rest, the soul the whilst not acting through the body, but exercising intelligence within itself. Thus also, such dreams as are true, in the view of him who reflects rightly, are the thoughts of a sober soul, undistracted for the time by the affections of the body, and counselling with itself in the best manner. For the soul to cease from activity within itself, were destruction to it. Wherefore always contemplating God, and by perpetual converse with Him inoculating the body with wakefulness, it raises man to equality with angelic grace, and from the practice of wakefulness it grasps the eternity of life.