There is a similar statement by Indra, the King of heaven, in Śrīmad-Bhāgavatam, Sixth Canto, Eighteenth Chapter, verse 74. There Indra addresses mother Diti in this manner: “My dear mother, persons who have given up all kinds of desire and are simply engaged in devotional service to the Lord know what is actually their self-interest. Such persons are actually serving their self-interests and are considered first-class experts in the matter of advancing to the perfectional stage of life.”