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-gita (7.20), kamais tais tair hrta jnanah prapadyante nya-devatah: 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 Brahma and Lord Siva, he did not hanker to take material benefits from them. Rather, he fixed his mind upon Lord Vasudeva and rendered devotional service unto Him. This is the sign of a pure devotee, whose heart is not adulterated by material desires.

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