bahvyas teṣāṁ prakṛtayo
bhūtānāṁ patayas tathā
citrā vācaḥ sravanti hi
If one is curious why Vedic literatures recommend so many different methods of worship and advancement, the answer is given here. Bhṛgu, Marīci, Atri, Aṅgirā, Pulastya, Pulaha and Kratu are the seven great brāhmaṇa sages and forefathers of this universe. The Kindevas are a race of human beings who are, like the demigods, completely free from fatigue, sweat and body odor. Seeing them, one may thus ask, kiṁ devāḥ: “Are they demigods?” Actually, they are human beings living on another planet within the universe. The Kinnaras are so called because they are kiñcin narāḥ, or “a little like human beings.” The Kinnaras have either a human head or human body (but not both) combined with a nonhuman form. The Kimpuruṣas are so called because they resemble human beings and thus prompt the question kiṁ puruṣāḥ: “Are these human beings?” Actually, they are a race of monkeys who are almost like human beings.
Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura explains that this verse describes the varieties of forgetfulness of the Supreme Personality of Godhead. The different Vedic mantras and rituals are especially meant for the different species of intelligent beings throughout the universe; but this proliferation of Vedic formulas indicates only the variety of material illusion and not a variety of ultimate purpose. The ultimate purpose of the many Vedic injunctions is one — to know and love the Supreme Personality of Godhead. The Lord Himself is emphatically explaining this to Śrī Uddhava.