760604 - Lecture - Srila Prabhupada Speaks a Nectar Drop in Los Angeles

From Vanipedia

Nectar Drops from Srila Prabhupada
"Suppose if somebody, if you say that "We are Kṛṣṇa conscious persons." So one may challenge you, "First of all, explain what do you know about Kṛṣṇa?" That is quite natural. If you do not know about Kṛṣṇa, you have no right to say that "I belong to the Kṛṣṇa consciousness movement." You have no right to say. So your position is like that. Simply if you have a tilaka and a kaṇṭhi, that does not mean that you belong to the Kṛṣṇa consciousness movement. Any cheater can do that. You must know the philosophy. If one challenges, you must reply. Therefore Bhaktivinoda Ṭhākura has sung a song indicating these cheaters. He says, eita eka kalir celā: "Here is a servant of Kali." What kind of celā? Nāke tilaka galai mālā. "He has got a tilaka and galai mālā. Bās. That's all." He does not know what is the philosophy. If you do not know the philosophy of Kṛṣṇa consciousness, if you simply mark your body with tilaka and kaṇṭhi, then you are not proper servant; you are not qualified."
760604 - Lecture SB 06.01.38 - Los Angeles