dharmaḥ satya-dayopeto vidyā vā tapasānvitā
dharmaḥ satya-dayopeto vidyā vā tapasānvitā |
mad-bhaktyāpetam ātmānaṁ na samyak prapunāti hi ||
(Śrīmad Bhāgavatam: 11.14.22; cited in Hari-bhakti-vilāsa: 11.557; Bhakti Sandarbha: 79, 111, 147)
“Devoid of bhakti to me, dharma endowed with truthfulness and compassion, or knowledge accompanied by austerity, certainly do not fully purify the mind.”