Nicene and Post-Nicene Fathers, Ser. II, Vol. XI: The Works of John Cassian.: Chapter II. Of the care with which the malady of dejection must be healed.

Of the care with which the malady of dejection must be healed. Wherefore if we are anxious to exert ourselves lawfully in the struggle of our spiritual combat we ought with no less care to set about healing this malady also. For “as the moth injures the garment, and the worm the wood, so dejection the heart of man.” 953 With sufficient clearness and appropriateness has the Divine Spirit expressed the force of this dangerous and most injurious fault. Prov. xxv. 20 (LXX.).