23 A joyful heart is life itself, and rejoicing lengthens one's life span. 24 Have pity on your own soul, pleasing God, and contain yourself: gather up your heart in his holiness: and drive away sadness far yourself. 25 Indulge yourself and take comfort, and remove sorrow far from you, for sorrow has destroyed many, and no advantage ever comes from it. 26 Jealousy and anger shorten life, and anxiety brings on premature old age. 27 Those who are cheerful and merry at table will benefit from their food.
Thus a true sacrifice is every work which is done that we may be united to God in holy fellowship, and which has a reference to that supreme good and end in which alone we can be truly blessed. And therefore even the mercy we show to men, if it is not shown for God's sake, is not a sacrifice. For, though made or offered by man, sacrifice is a divine thing, as those who called it sacrifice meant to indicate. Thus man himself, consecrated in the name of God, and vowed to God, is a sacrifice in so far as he dies to the world that he may live to God. For this is a part of that mercy which each man shows to himself; as it is written, Have mercy on your soul by pleasing God. Our body, too, as a sacrifice when we chasten it by temperance, if we do so as we ought, for God's sake, that we may not yield our members instruments of unrighteousness unto sin, but instruments of righteousness unto God.