Prabhupada's lecture - Śrīmad-Bhāgavatam 1.8.41 - Los Angeles, May 3, 1973
So bhakti means detachment. Vairāgya-vidyā-nija-bhakti-yoga [Cc. Madhya 6.254]. Bhakti-yoga means detachment. Our suffering is due to our attachment. Because we are materially attached, I am desiring so many things materially. Therefore, Kṛṣṇa is giving me opportunity to enjoy that material facility. Whatever I want, whatever I desire... Of course, I must deserve. First deserve, then desire. Suppose if I want to become king. So I must have pious activities behind me so that I can become king. But Kṛṣṇa can fulfill. Whatever you want, Kṛṣṇa can give you. Kṛṣṇa can give you even mukti, liberation, the Māyāvādīs' mukti.
But He does not give very easily bhakti. That He does not give. Kṛṣṇa can give you all material gifts, even up to mukti if you want. But when He gives bhakti, oh, that is special consideration. Because when He gives somebody bhakti, He becomes purchased by the bhakta. So therefore He considers, considers. Become... Kṛṣṇa becomes a tool in the hands of bhakta. Although He's so..., the supreme powerful. Just like Rādhārāṇī, the symbol of the topmost bhakti, Rādhārāṇī. So She has purchased Kṛṣṇa. She has purchased Kṛṣṇa, She's so powerful. Therefore Vaiṣṇavas, they take shelter of the lotus feet of Rādhārāṇī so that if She recommends, "Oh, here is a nice devotee," Kṛṣṇa has to accept.