The Supreme Lord is achieved by devotion (bhaktya mam abhijanati [Bg. 18.55]). One's devotion and sincere desire to serve the Supreme Personality of Godhead are the only qualifications. Rupa Gosvami has also said that the price for achieving God's favor is simply one's sincere eagerness to have it (laulyam ekam mulyam).

From Srila Prabhupada's purport to SB 5.19.7.