Kṛṣṇa is the Supreme Person. Kṛṣṇa is the original of everything, original source of everything. That is the verdict of the . . . therefore Arjuna accepted, sarvam etad ṛtaṁ manye yad vadasi keśava (BG 10.14): "My dear Kṛṣṇa, whatever You are saying, I accept Him, accept all these in toto, not deducting, not giving my own commentation." This is the way of studying Bhagavad-gītā. So if you study Bhagavad-gītā as it is, as it is said in the . . . and if you accept it, then your life is successful. Otherwise, panthās tu koṭi-śata-vatsara-sampragamyo vāyor athāpi manaso muni-puṅgavānām (Bs. 5.34), you'll never understand what is God or what is ultimate source, what is Absolute Truth.
So the Bhagavad-gītā is the essence of all Vedic literatures because, after all, Vedic literature means vedaiś ca sarvair aham eva vedyaḥ (BG 15.15), to understand Kṛṣṇa, the Absolute Truth, the Supreme Personality of Godhead. That is the purpose of Vedic study. So the Supreme Personality Himself is giving the knowledge of the Supreme by Himself, personally. Therefore we are preaching this Bhagavad-gītā as it is, Kṛṣṇa consciousness. And the easiest method is to chant Kṛṣṇa's name. Easiest method. It is recommended. It is not our manufacture. It is said. When Mahārāja Parīkṣit learned all the defects of this Kali-yuga, then he was little disappointed, "How these men or the persons . . .?" Men means human being. "How they will be relieved from the miserable condition of materialistic life in this age of Kali?" Because it is all defective.