This Brāhmiṇ, Kṣatriya, Vaiśya, Śūdra, these designation to make a systematic progress of human life. But actually, when one becomes pure devotee, he is above all these things. He is above all these things. Caṇḍālo 'pi dvija-śreṣṭho hari-bhakti-parāyaṇaḥ. "Even one is caṇḍāla, if he becomes a pure devotee, then he becomes better than a Brāhmiṇ." They are not ordinary things.
So pure bhakti-yoga, this bhakti-yoga, means sarvopādhi-vinirmuktam, one has to be free from all designation. Now, these boys and girls, they have forgotten. Either they are American or Indian or African, they do not remember. They know that they are eternal servant of Kṛṣṇa. That is pure bhakti. Sarvopādhi-vinirmuktaṁ tat-paratvena nirmalam. This is freedom. Nirmalam means mukti. Mala means dirty things. So long we are enwrapped with the dirty things, there is no bhakti. Tat-paratvena nirmalam. When this nirmala, when dirty things are washed away, you remain in pure spiritual life or spiritual body, then the indriyas, the senses . . . you have got senses. In the spiritual life you will also . . . spiritual life does not means without senses.
Otherwise, why it is said hṛṣīkeṇa? Hṛṣīka means indriya, senses. The senses are purified, not the senses are gone. Just like if you have got cataract, if it is operated, the cataract is taken away, not the eye is taken away. Eyes must remain there. Then what is the use of treatment? Similarly, our senses, at the present moment they are contaminated. You have to make it purified. Tat-paratvena nirmalam. And when it is purified, hṛṣīkeṇa hṛṣīkeśa-sevanaṁ bhaktir ucyate, with that purified senses, when you serve Kṛṣṇa, that is called bhakti.
So bhakti is not ordinary thing, this bhakti-yoga. You have to understand it. You have to practice it, under training, as these boys and girls are going. Then you will understand what is God. And as soon as you understand God, your relationship with God, then jñāna and vairāgya will be there.
Jñāna . . . by jñāna you will understand that you are not this material . . . any product of this material world. This is called vairāgya, jñāna. And vairāgya means if you are not interested in this material world, then your real interest is spiritual life; that makes your life successful.