Śrīla Narottama dāsa Ṭhākura has sung:

anya devāśraya nāi, tomāre kahinu bhāi, ei bhakti parama karaṇa

If one wants to become a pure devotee of the Supreme Lord, one should not hanker to take benedictions from the demigods. As stated in Bhagavad-gītā (7.20) , kāmais tais tair hṛta-jñānāḥ prapadyante ’nya-devatāḥ: those befooled by the illusion of the material energy worship gods other than the Supreme Personality of Godhead. Therefore, although Rantideva was personally able to see Lord Brahmā and Lord Śiva, he did not hanker to take material benefits from them. Rather, he fixed his mind upon Lord Vāsudeva and rendered devotional service unto Him. This is the sign of a pure devotee, whose heart is not adulterated by material desires.

anyābhilāṣitā-śūnyaṁ jñāna-karmādy-anāvṛtam ānukūlyena kṛṣṇānu- śīlanaṁ bhaktir uttamā

“One should render transcendental loving service to the Supreme Lord Kṛṣṇa favorably and without desire for material profit or gain through fruitive activities or philosophical speculation. That is called pure devotional service.”