Mahā-mantra—the great chanting for deliverance: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare; is the great mantra composed of the principal names of Godhead in their vocative forms. This maha-mantra is found in the Purāṇas and Upaniṣads and is specifically recommended for chanting in this Age of Kali as the only means of God realization. Lord Caitanya personally designated it as the mahā-mantra and practically demonstrated the effects of the chanting.