Christ said, "I assure you, as often as you did it for one of my least brothers, you did it for me." (Mt. 25:40) Mercy as it is here contemplated is said to be a virtue influencing one's will to have compassion for, and, if possible, to alleviate another's misfortune. It is the teaching of St. Thomas Aquinas that although mercy is as it were the spontaneous product of charity, yet it is to be reckoned a special virtue adequately distinguishable from this latter. In fact the Scholastics in cataloguing it consider it to be referable to the quality of justice mainly because, like justice, it controls relations between distinct persons. It is as they say ad alterum. Its motive is the misery which one discerns in another, particularly in so far as this condition is deemed to be, in some sense at least, involuntary. Obviously the necessity which is to be succoured can be either of body or soul. The Divine command is set forth in the most stringent terms by Christ, and the failure to comply with it is visited with the supreme penalty of eternal damnation (Matthew 25:41): "Then he shall say to them also that shall be on his left hand: Depart from me, you cursed, in everlasting fire which was prepared for the devil and his angels. For I was hungry, and you gave me not to eat; I was thirsty, and you gave me not to drink. I was a stranger, and you took me not in; naked, and you covered me not; sick and in prison, and you did not visit me", etc.