Preaching means he must be conscious, Kṛṣṇa conscious, advanced. Kṛṣṇa conscious means that he's a lover of Kṛṣṇa. Iśvare tad... He'll see four things: first Kṛṣṇa, īśvara; and tad-adhīna, the devotees... Iśvare tad-adhīneṣu and bāliśeṣu. Bāliśa means people, ignorant men, who do not know what is Kṛṣṇa consciousness. They are called bāliśa, just like child. Child is called bāliśa. Ignorant men, bāliśeṣu, dviṣatsu ca, and other class. He'll see four things: īśvara, the Supreme Personality of Godhead; he'll see the devotees of Kṛṣṇa; he'll see some ignorant person; and he'll see some envious person. That you will have to meet. If you become preacher, then you'll create so many enemies also. Just like Prahlāda Mahārāja. His father became enemy, not outside. Outside he might have many enemies, but the five-years-old boy, because he was taking opportunity in the school and as soon as the teachers are out, in the tiffin hour, he would immediately stand up on the bench and preach... You have seen the picture. He was preaching amongst his small class friends. That preaching work is there in the Śrīmad-Bhāgavatam, how he was intelligently preaching.
His first was... Kaumāram... Bhakta? I forget now. My memory is becoming old. (laughs) So, kaumāra ācaret prājño dharmān bhāgavatān iha (SB 7.6.1). That, he was preaching: "My dear friends, we are now unmarried boys, so this is the opportunity. Now we are unmarried. We are not very much attached to family life. This is the opportunity." Kaumāra ācaret prājñaḥ. Because as soon as one becomes materially affectionate... Here it is said, prākṛtena ātmanā viprāḥ sneha-moha-vaśam. The more we increase... When the child, when we are children, we have got little affection for playing or for father, mother, that's all, limited. But the more we grow, and especially when you are married, then this material affection increases, more entangled. That is also stated in the Śrīmad-Bhāgavatam, puṁsaḥ striyā mithunī-bhāvam etam (SB 5.5.8). This material life means sex life. So a man is searching after woman, and woman is searching after man. This is material bondage. This is natural not only human society—in dog society. Just see. The dog is crying, is crying at night because he has lost that woman. Is it not? Just see, even in the dog, what to speak of human being. So this is material life, to be affectionate unnecessarily. Therefore devotional service means vairāgya-vidyā. Caitanya Mahāprabhu showed by His example how He gave up the affection of young, beautiful wife, very nice home, most affectionate mother, most influential position in the society—gave up.
So this is the..., people do not know what is devotional service. Devotional service means... Just like Kuntī was praying, "My dear Kṛṣṇa, kindly help me how can I give up this affection of my family, the Pāṇḍavas and the Vṛṣṇis." This is required. This is the first sacrifice, not prākṛtena vaśaṁ gataḥ. Then it is... Actually, the perfection of life is no more affection for anything material: brahma-bhūtaḥ prasannātmā na śocati na kāṅkṣati (BG 18.54). That is the beginning, when we have lost complete affection for... We are not cruel; that is not another... But we know, we should know, that this is not required. This is simply moha. This is simply moha. This is illusion. It has no meaning. It is simply entanglement. That one must know. That is called vairāgya. Vairāgya-vidyā. Sarvabhauma Bhaṭṭācārya wrote hundred verses appreciating Śrī Caitanya Mahāprabhu, of which two verses are available, because when he sent the hundred verses glorifying Śrī Caitanya Mahāprabhu, He immediately torn the papers, but the devotees collected the torn papers and saved one or two ślokas.