As soon as we know that, "I am not owner of this body, I am the occupier of the body," that is knowledge. We are falsely claiming that we are owner of the body. We are not owner of the body. I cannot therefore repair anything. If any part of my limb of my body goes wrong, I do not know how to repair it. But Kṛṣṇa can do it, because He is the owner, Hṛṣīkeśa. Hṛṣīkeśa. Hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate (CC Madhya 19.170). You have to pay to the owner. Similarly, we have to serve Kṛṣṇa for occupying this body. That is devotion. Yajñārthe karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ (BG 3.9).
Because it is also explained, sarvataḥ pāṇi-pādas tat. Sarvataḥ pāṇi-pādas tat means everywhere the Supreme Lord has got His hands and legs. So what is that? How He has got hands and legs? Your hands, my hands, they are hands of Kṛṣṇa. Therefore it should be used for Kṛṣṇa. Just like your hand. We are claiming, "This is my hand." This hand is used for my service. Suppose if you want to eat something, you use your hand for eating, but for other's eating, you don't use your hand; he uses his own hand. This is an example. So all these hands and legs belong to Kṛṣṇa. It should be used for Kṛṣṇa. That is called bhakti. Hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate (CC Madhya 19.170). If you don't use, then that is against the laws of nature.