Siddhānta, to become a pure devotee, a staunch devotee of Kṛṣṇa, one has to learn about Kṛṣṇa. Kṛṣṇa is, therefore, coming personally to teach us what He is. That is required. Vāsudeva-kathā-ruci (SB 1.2.16). Our life is meant for becoming Kṛṣṇa conscious. Ruci.
This ruci is very important thing. Ruci means . . . just like we like to eat some favorable food. That is called ruci. Somebody is interested in eating some salty food, somebody's interested some sweet food, spicy food . . . just like we have got taste for different types of food, similarly, when we shall increase our taste, propensity for Kṛṣṇa, that is the beginning of our perfection. Before that, we are in the material consciousness.
When we increase the taste for Kṛṣṇa, for understanding Kṛṣṇa . . . this ruci comes when one is actually liberated. This ruci. Tato 'nartha-nivṛttiḥ syāt. First of all, śraddadhānasya. As it is stated here, śraddhā, faith. Kṛṣṇa is . . . Kṛṣṇa says that mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya (BG 7.7): "There is no more superior authority than Me." Mattaḥ parataraṁ na anyat. Na, "Nobody else. I am the Supreme."
So when we have faith in this explanation of Kṛṣṇa . . . as Arjuna said . . . Arjuna, after hearing Bhagavad-gītā, he said, sarvam etad ṛtaṁ manye yad vadasi keśava (BG 10.14): "My dear Kṛṣṇa, whatever You are saying, I accept them in toto, word to word." This is required. Not that I give up this portion, I give up that portion, whatever is to my purpose . . . just like sometimes the politicians, scholars, they also try to understand Bhagavad-gītā. Because Bhagavad-gītā is very authoritative book, they want to exploit. They do not understand what is Bhagavad-gītā; otherwise they would have preached Kṛṣṇa.
Because what is Bhagavad-gītā? Bhagavad-gītā is Kṛṣṇa, Kṛṣṇa, the supreme. That is to be taught. That is to be understood. That is Bhagavad-gītā. Not that keeping Bhagavad-gītā in front, a scapegoat, I become great politician and great scholar and give my own opinion: "In my opinion, it is like this." This is nonsense. What you are, your opinion? We don't care, we don't care for all these nonsense who gives his own opinion, as if Kṛṣṇa left something to be opined by another rascal. This is their business. He becomes greater than Kṛṣṇa, to interpret Kṛṣṇa's words. This is rascaldom. We don't accept.