Recipe

 Those on a spiritual practice have a recipe for this practice.  That is, the person mixes a little of this with a little of that and a main ingredient for their recipe for holiness.  They indeed become food for others because of this recipe in practice.  How so?  One is by example, that is, their manner of being present and listening, such that they make helpful responses if response is called for.  Another way the person becomes food for others is their helpfulness, their service, their putting aside of self, self, self.  The spiritual person is caring for themself by their recipe of practice.  The parts of the recipe come from listening to others or readings from those who have a practice.  A good recipe is always food for the soul.