Anyone can preach Krishna consciousness by simply teaching three truths—all else is secondary embellishment.Listen — Srila Prabhupada Uvaca
Prabhupāda: And whatever plan he's making, it will be all frustrated. That is the whole history. Big, big emperor, big, big politicians, they have tried. Roman Empire, the Carthaginian Empire, Greece Empire, Egyptian Empire and Mogul Empire, British Empire—all frustrated.
It will never be successful. For a few days, hundred, two hundred years or five hundred years, it may go on. So real plan is how to become Kṛṣṇa conscious. Then everything is successful.
Ahaṅkāra-vimūḍhātmā kartāham iti manyate [Bg 3.27]. These rascals, on account of false prestigious position, trying to be happy without God. That is not possible. Throughout the history you study.
So many rascals have tried—the Napoleon, the Hitler, the Gandhi, this, that. What they have achieved? Nothing. If we honestly study their lives and activities, what they have achieved?
Hmm? Do you think they have achieved anything? Satsvarūpa: No. Prabhupāda: They simply wasted their time. Śrama eva hi kevalam [SB 1.2.8]. Simply wasting time. Therefore this is the best service, to revive Kṛṣṇa consciousness for the human society and send them back home, back to Godhead.
This is the best service. Gargamuni: And if anybody helps us, then he is also greatly benefited. Prabhupāda: He is also... He becomes recognized by the master: "Oh, he is trying for this, what I want." Naturally he becomes immediately recognized—although he has no qualification—if he tries. Therefore Caitanya Mahāprabhu... Yāre dekha tāre kaha 'kṛṣṇa'-upadeśa [Cc Madhya 7.128]: "You become guru.
No qualification required. Simply you repeat what Kṛṣṇa has said." Just see how simplified. Don't talk anything nonsense. Yāre dekha tāre kaha 'kṛṣṇa'—bās.