The Hare Krishna mantra, also referred to reverentially as the Maha Mantra ("Great Mantra"), is a 16-word Vaishnava mantra which is mentioned in the Kali-Santarana Upanishad, and which from the 15th century rose to importance in the Bhakti movement following the teachings of Chaitanya Mahaprabhu. This Mantra is composed of three Sanskrit names of the Supreme Being; "Hare", "Krishna", and "Rama".
According to Gaudiya Vaishnava theology, one's original consciousness and goal of life is pure love of god (Krishna). Since the 1960s, the mantra has been made well known outside India by A. C. Bhaktivedanta Swami Prabhupada and his International Society for Krishna Consciousness (commonly known as "the Hare Krishnas").
The Hare Krishna mantra is composed of Sanskrit names in the singular vocative case: Hare, Krishna, and Rama (in Anglicized spelling). It is a poetic stanza in anuṣṭubh meter (A quatrain of four lines (pāda) of eight syllables).
hare kṛṣṇa hare kṛṣṇa
kṛṣṇa kṛṣṇa hare hare
hare rāma hare rāma
rāma rāma hare hare
Sanskrit is a polysemic language and as such, this mantra has multiple interpretations all of which may be considered as correct. "Hare" can be interpreted as either the vocative form of Hari, another name of Vishnu meaning "he who removes illusion". Another interpretation is as the vocative of Harā, a name of Rādhā, Krishna's eternal consort or His energy (Krishna's Shakti). According to A. C. Bhaktivedanta Swami Prabhupada, Harā refers to "the energy/shakti of Supreme Personality of Godhead" while Krishna and Rama refer to Supreme Godhead Himself, meaning "He who is All-Attractive" and "He who is the Source of All Pleasure". In the hymn Vishnu Sahasranama spoken by Bhishma in praise of Krishna after the Kurukshetra War, Krishna is also called Rama.