(Prabhupada's lecture - Śrīmad-Bhāgavatam 1.16.25 - Hawaii, January 21, 1974)
So it is a great science, how by tongue... Actually, our, this Kṛṣṇa consciousness movement is to teach people how to engage the tongue in the service of the Lord. This is Kṛṣṇa consciousness. We are requesting everyone, "Chant Hare Kṛṣṇa." That is beginning with tongue. "And take prasādam and go home." That's all. Philosophy later on. Philosophy later on. Because, unless one has got clear brain, unless has actually the senses, purified, one cannot take the lesson of the Kṛṣṇa consciousness movement. Just like this is philosophy. One cannot understand the lessons which are given in the Śrīmad-Bhāgavatam, Bhagavad-gītā...
Therefore in the beginning we do not ask anybody, outsider, that "Read Bhagavad-gītā or..." No. "Please come, chant with us Hare Kṛṣṇa." That is required. Chant Hare Kṛṣṇa and you will feel. You'll feel. Because this method will cleanse your heart. The more you chant Hare Kṛṣṇa mahā-mantra, the more you become fit to understand the philosophy of Kṛṣṇa consciousness. That is the process. Sevonmukhe hi jihvādau [Brs. 1.2.234].