The goal of Vedantic study, therefore, is to know the Supreme Lord Krishna. This point is stressed in Bhagavad-gita chapter 8, verse 13, where it is stated that by the mystic yoga process, ultimately vibrating the sacred syllable Om, one attains to His Supreme Spiritual Planet. In the Vedanta Sutras, which you have certainly read, the fourth chapter, fourth Adhikaran twenty-second Sutra states it positively; "Anavritti sabat..."--By sound vibration one becomes liberated. By devotional service, by understanding well what is the Supreme Personality of Godhead, anyone who goes to His Abode never comes back again to this material condition. How is it possible? The answer is, simply by chanting His name constantly.
This is accepted by the exemplary disciple, Arjuna, who has perfectly learned the conclusion of spiritual science from the Yogisvara, master of mystic knowledge, Krishna, recognizing Krishna to be the Supreme Brahman, Arjuna addresses Him: "Sthane Hrsikesa..." (B.G. 11:36) — "the world becomes joyful hearing Your Name; and thus do all become attached to You." The process of chanting is herein authorized as the direct means of contacting the Supreme Absolute Truth the Personality of Godhead. Simply by chanting the Holy Name, Krishna, the soul is attracted by the Supreme Person, Krishna, for going home, back to Godhead.
In the Narada Pancaratra it is stated that all the Vedic rituals, Mantras and understanding are compressed into the eight words; Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare. Similarly, in the Kalisantra Upanisad it is stated that these sixteen words Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare, Hare Rama, Hare Rama, Rama Rama, Hare Hare are especially meant for counteracting the degrading and contaminating influence of this materialistic age of Kali.
All these points are elaborately presented in my book, The Teachings of Lord Chaitanya.