Kaśyapa Muni was in the category of the living entities, but he had a transcendental son, Vāmanadeva, who was an incarnation of Viṣṇu. Thus although Lord Viṣṇu is the Supreme Personality of Godhead, He offered His respects to Kaśyapa Muni. Similarly, when Lord Kṛṣṇa was a child He used to offer His respectful obeisances to His mother and father, Nanda and Yaśodā. Also, at the Battle of Kurukṣetra, Lord Kṛṣṇa touched the feet of Mahārāja Yudhiṣṭhira because the King was His elder. It appears, then, that the Personality of Godhead, Lord Śiva and other devotees, in spite of their being situated in exalted positions, instructed by practical example how to offer obeisances to their superiors. Lord Śiva offered his respectful obeisances to Brahmā because Brahmā was his father, just as Kaśyapa Muni was the father of Vāmana.