26. But what is more admirable than abstinence, which makes even the years of youth to ripen, so that there is an old age of character? For as by excess of food and by drunkenness even mature age is excited, so the wildness of youth is lessened by scanty feasts and by the running stream. An external fire is extinguished by pouring on water, it is then no wonder if the inward heat of the body is cooled by draughts from the stream, for the flame is fed or fails according to the fuel. As hay, straw, wood, oil, and such like things are the nourishment which feeds fire, if you take them away, or do not supply them, the fire is extinguished. In like manner then the heat of the body is supported or lessened by food, it is excited by food and lessened by food. Luxury then is the mother of lust.