Premanand Maharaj Ji
Which seva is best: with the body, with money, or with the mind?
Serve with the body first, to reach mental seva
Mental seva is the highest, but you gain the right to it only by serving a great deal with the body. Seva done with the mind fully in it comes from surrender.
Mental seva is better than seva with body and wealth, but you enter mental seva only when physical seva is done.