Somebody is working very hard. Nobody is interested to work very hard for others. That is not the material philosophy. Everyone wants his own satisfaction, means sense gratification. So those who are in the bodily concept of life, they are working for their bodily sense gratification. But if we consider philosophically, we'll see that even this body does not belong to me. Therefore it is a very important word, pārakyasya.
From the very beginning, the body was given by father and mother. So if anyone creates something, so that thing belongs to the creator. If the father and mother has created this body, then from the very beginning the body belongs to the father and mother. And actually, in the childhood, as the father and mother says: "Sit down here, eat this, don't go there," everything is controlled by the father and mother, and originally given by the father and mother. So how we can claim, "This is my body"? From the very beginning.
Then somebody maintains you. Suppose you are working in office, in a factory. So actually that body belongs to him, the maintainer. Just like a dog: the master maintains it, and the dog's body is meant for the service of that master. As soon as the master indicates, "You do this," immediately he does it. A dog has no independence, practical. So in this way the body belongs to the master.