In this connection Śrīla Rūpa Gosvāmī gives evidence from Śrīmad-Bhāgavatam, Eleventh Canto, Twenty-first Chapter, verse 2, in which Lord Kṛṣṇa says to Uddhava, "The distinction between qualification and disqualification may be made in this way: persons who are already elevated in discharging devotional service will never again take shelter of the processes of fruitive activity or philosophical speculation. If one sticks to devotional service and is conducted by regulative principles given by the authorities and ācāryas, that is the best qualification."
This statement is supported in Śrīmad-Bhāgavatam, First Canto, Fifth Chapter, verse 17, wherein Śrī Nārada Muni advises Vyāsadeva thus: "Even if one does not execute his specific occupational duty, but immediately takes direct shelter of the lotus feet of Hari (Kṛṣṇa), there will be no fault on his part, and in all circumstances his position is secure. Even if, by some bad association, he falls down while executing devotional service, or if he doesn't finish the complete course of devotional service and dies untimely, still he is not at a loss. A person who is simply discharging his occupational duty in varṇa and āśrama, however, with no Kṛṣṇa consciousness, practically does not gain the true benefit of human life." The purport is that all conditioned souls who are engaged very frantically in activities for sense gratification, without knowing that this process will never help them get out of material contamination, are awarded only with repeated births and deaths.