The four classes of neophyte devotees who approach the Supreme Personality of Godhead to offer devotional service because of material motives are not pure devotees, but the advantage for such materialistic devotees is that they sometimes give up their material desires and become pure. When the demigods are utterly helpless, they approach the Supreme Personality of Godhead in grief and with tears in their eyes, praying to the Lord, and thus they become almost pure devotees, free from material desires. Admitting that they have forgotten pure devotional service because of extensive material opportunities, they fully surrender to the Lord, leaving to His consideration whether to maintain them or annihilate them. Such surrender is necessary. Bhaktivinoda Thakura sings, marabi rakhabiyo iccha tohara: O Lord, I fully surrender unto Your lotus feet. Now, as You desire, You may protect me or annihilate me. You have the full right to do either.