When one is fully engaged in Krishna consciousness, beginning by chanting the maha-mantra – Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare Hare Rama, Hare Rama, Rama Rama, Hare Hare – then only can one understand the Supreme Personality of Godhead.
Bhagavad Gita 7.24,
Srila Prabhupada