The words mad-dharmātma-mano-ratiḥ mean that all of one’s love and affection should be devoted to pleasing the Supreme Personality of Godhead. It is not indicated here that one should try to relish selfish satisfaction in devotional service, but rather that one should be attracted to the Lord’s own satisfaction, which one achieves by faithfully executing the order of a bona fide spiritual master coming in disciplic succession from Lord Kṛṣṇa Himself. Attachment to one’s own satisfaction, even within devotional service, is materialistic, whereas attachment to the satisfaction of the Lord is pure spiritual emotion.