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.