“Chant the Holy Names, chant the Holy Names, chant the Holy Names. There is not other way, no other way, no other way to become happy in this age.”
TLC-18 In the Nārada-pañcarātra it is stated:eṣo vedāḥ ṣaḍ–aṅgāni chandāṁsi vividhāḥ surāḥ sarvam aṣṭākṣarāntaḥsthaṁ yac cānyad api vāṅmayam sarva–vedānta-sārārthaḥ saṁsārārṇava-tāraṇaḥ
“All Vedic rituals, mantras and understanding are compressed into eight words: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare.”
Similarly, in the Kalisantaraṇa Upaniṣad it is stated: hare kṛṣṇa hare kṛṣṇa kṛṣṇa kṛṣṇa hare hare hare rāma hare rāma
“The sixteen words-Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare-are especially meant for counteracting the contaminations of Kali. To save oneself from the contamination of Kali, there is no alternative but the chanting of these sixteen words.”
Lord Caitanya informed Prakāśānanda Sarasvatī that when His spiritual master understood Him, he said, “It is the transcendental nature of the holy names HareKṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare to transport a man into spiritual madness. Anyone who sincerely chants this holy name very soon attains elevation to the platform of love of God and becomes mad after God. This madness arising from love of God is the first perfectional stage for a human being.”