Srila Prabhuapda: Generally a human being is interested in religion, economic development, sense gratification and liberation, but love of God is above all these. A bona fide spiritual master chants the holy names-Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare-and the transcendental sound vibration enters into the ear of the disciple, and if a disciple follows in the footsteps of his spiritual master and chants the holy name with similar respect, he actually comes to worship the transcendental name. When the transcendental name is worshiped by the devotee, the name Himself spreads His glories within the heart of a devotee. When a devotee is perfectly qualified in chanting the transcendental vibration of the holy name, he is quite fit to become a spiritual master and to deliver all the people of the world. The chanting of the holy name is so powerful that it gradually establishes its supremacy above everything in the world. The devotee who chants it becomes transcendentally situated in ecstasy and sometimes laughs, cries and dances in his ecstasy. Sometimes the unintelligent put hindrances in the path of chanting this mahā-mantra, but one who is situated on the platform of love of Godhead chants the holy name loudly for all concerned. As a result, everyone becomes initiated in the chanting of the holy names-Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. By chanting and hearing the holy names of Kṛṣṇa, a person can remember the forms and qualities of Kṛṣṇa. (Teachings of Lord Caitanya – 1968 Edition, Chapter 18)
The Hare Krishna Movement 