As soon as you get some opportunity, preach. What is that preach? Preaching, Caitanya Mahāprabhu has advised us, yāre dekha tāre kaha kṛṣṇa-upadeśa [Cc. Madhya 7.128]. This is preaching. “Whoever you meet, simply speak of the instruction of Kṛṣṇa.” So if you are advanced, if you know what is the instruction of Kṛṣṇa by reading Bhagavad-gītā, you can preach to others. And if you have not read anything, suppose you do not know anything, then you can also preach. What is that? “Just become a devotee of Kṛṣṇa, my dear sir.” That’s all. This is also preaching. “Just surrender to Kṛṣṇa.” You go door to door. If you cannot do anything, simply say, “My dear sir, you are very good man. Oh, you are very intelligent man. Chant Hare Kṛṣṇa.” Sakalam eva vihāya dūrāt. This preaching was taught by Prabodhānanda Sarasvatī. Dante nidhāya tṛṇakaṁ padayor nipatya kāku-śataṁ kṛtvā ca ahaṁ bravīmi. This is the preaching process. Dante nidhāya tṛṇakam.
According to Vedic civilization, if one wants to become very humble and approach another person, then he has to take one straw in the mouth. Tṛṇa. So the preaching process is to take a straw in the mouth, dante nidhāya tṛṇakaṁ padayor nipatya, and falling down on your feet, dante nidhāya tṛṇakaṁ padayor, kāku-śataṁ kṛtvā ca ahaṁ bravīmi. And flattering you: “Sir, you are so great man, you are so intelligent man.” This is flattering. Although he is fool number one, we have to flatter like that. “Oh, there is no greater man like you. You are so intelligent, you are so rich, you are so beautiful.” So all these things. Just like the beggars. Sometimes: “You become king.” And one thinks, “Oh, he is blessing me. All right, you take one paisa.” So this flattering is also required. So kāku-śataṁ kṛtvā cāhaṁ bravīmi. So the man may ask that “Why you are so humble and flattering? What is your intention? Tell me.” So he is now telling. He sādhavaḥ, “Oh, you are great sādhu.” He sādhavaḥ, sakalam eva vihāya dūrāt: “You have learned so many nice things. I know that. But kick them out, please.” Sakalam eva. “Whatever you have nonsense learned, rascaldom you have learned, please kick them out. This is my request.” Sakalam eva vihāya dūrāt caitanya-candra-caraṇe kurutānurāgam. “Just hear what Śrī Caitanya Mahāprabhu says. This is my request.” This is preaching. This is preaching. Flatter, fall down on his feet, and eulogize him as great sādhu, as great intelligent, great rich. Do so that he may little hear.
And when he says, “What do you want?” “Now, (laughter) I want this, sir. Whatever rascaldom you have learned, please forget. Because I know you are rascal number one. (laughter) You have got so many hodge-podge thing in your brain. So you kick them out please.” Sakalam eva vihāya dūrāt. “Kick them, throw away, long distance. Don’t look upon them.” “Then what to do?” Caitanya-candra-caraṇe kurutānurāgam. “Please hear what Caitanya-candra says.” śrī-kṛṣṇa-caitanya-dayā karaha vicāra, vicāra karile citte pābe camatkāra: “Just try to understand the mercy of Śrī Caitanya Mahāprabhu and you will feel so sublime.”
Śrī-kṛṣṇa-caitanya-dayā karaha vicāra. “Don’t take it blindly. If you are intelligent, just make a judgment, what Caitanya-candra is.” Tell him.
So this is preaching. This is preaching. So Arjuna has to be a preacher. Practical preacher. What is that preaching? That he has to sacrifice everything for Kṛṣṇa’s sake. That’s all. This is preaching. Sakalam eva vihāya dūrāt. Arjuna will be the greatest example, how he became Kṛṣṇa conscious, in the last Tenth Chapter. He will say, sarvam etad ṛtaṁ manye yad vadasi keśava: [Bg. 10.14] “My dear Kṛṣṇa, Keśava, whatever you say, I accept in total.” Without any interpretation.
– Lecture on Bhagavad-gītā 1.28-29 — London, July 22, 1973