If, by good fortune, one who has fallen into the ocean of material existence renders service to the pure devotees of the Supreme Lord, who are freed from all material desires, the Lord will deliver him, out of His causeless mercy. Simply by rendering service to the spiritual master and other advanced devotees, one surely receives the mercy of the Lord. It is a well-known fact that the Lord is more mercifully inclined toward those who consider themselves devotees of His devotees than those who claim to be His direct devotees.

(Srila Bhaktisiddhanta Sarasvati Prabhupada's commentary on SB 11.17.44)