The best type of Seva is feeding the hungry. It is not charity that you do. You are only offering gratitude to God by offering the food to these Gods in human form. (Sens.SS, p. 169)

The gift of food is the noblest of all gifts. (Sens.SS, p. 171)

You are referring to the gift of food as Charity of Food. But, no one has the authority to give in charity what has been given by god or be proud of it or even to feel that he has given something in charity. God gave the rains, God fostered the sapling and God ripened the grain; what right have you to call it yours and give it in charity? It is not charity that you do, you are only offering gratitude to God; you are sanctifying the grain you have harvested by offering the food prepared out of it to these Gods (Narayana) in human form. Call it Narayana Seva! That will be more correct. Narayana Seva is feeding the hungry with reverence and humility.

Narayana Seva; that is to say, service to God, not service to Man. (Sens.SS, pp. 173-174)