And Caitanya Mahāprabhu said, when He was asked by a gṛhastha devotee what should be the behavior of a Vaiṣṇava, He immediately said asat-saṅga tyāga, ei vaiṣṇava ācāra: [Cc. Madhya 22.87] "Give up the company of all rascals, asat." Asat means those who are rascals. That is Vaiṣṇava. Do not mix with all rascals, asat. Now how shall I know who is rascal and who is not a (rascal)? Asat eka 'strī-saṅgī—-eka asādhu, kṛṣṇa-bhakta āra. One who is too much attached with woman, he is rascal. Another rascal, who is not a devotee of Kṛṣṇa. That's all. So we have got everything test tube. Put the test tube and you understand. If one is strī-saṅgī... Strī-saṅgī means not only the man, the man or woman, one who are very much sexually attached, he is a rascal. One should give up his company. And another rascal who is not a devotee of Kṛṣṇa. That's all, finished. So if you want to be a Vaiṣṇava, you must give up the company of these two rascals. Then your progress is guaranteed. Everything is there. There is no difficulty to distinguish between rascals and intelligent, guru and bluffer. Everything is there. And to become a perfect Vaiṣṇava, Caitanya Mahāprabhu said asat-saṅga tyāga ei vaiṣṇava. Don't talk even with these rascals.
 
But sometimes in the preaching work we have to talk with such rascals, but not to take their theory but to teach them our theory. If you become defeated by their theory, then you are not a preacher. Don't preach, chant Hare Kṛṣṇa. You are not fit for teaching. If you become overcome by their teaching, then you are finished. A preacher is madhyama-adhikārī, advanced devotee. He can preach. Kaniṣṭha-adhikārī should be engaged in temple worship, very nicely, then gradually he'll come to the madhyama-adhikārī. So the preacher is madhyama-adhikārī. A kaniṣṭha-adhikārī cannot become preacher. He is in the lowest stage of devotional service; he cannot become preacher. He'll be conquered by the asat. And madhyama-adhikārī, he knows how to deal with asat. At least he does not mix with them. That's all. If he cannot defeat them, he should avoid them, because that valuable time can be utilized for preaching Kṛṣṇa consciousness to a person who is inquisitive to hear. Bāliśya. Bāliśya means innocent. He wants to know something about Kṛṣṇa. Better deal with him than with the rascals and waste time. Better avoid the rascals.

June 27 1976