Harer Namaiva Kevalam
In this age of logic, argument and disagreement, the chanting of Hare Krsna is the only means for self-realization. Because this transcendental vibration alone can deliver the conditioned soul, it is considered to be the essence of the Vedanta-sūtra. (Pg no-202 – Last Para)
A student is to be considered perfected when he understands the identity of the holy name and the Supreme Lord. Unless one is under the shelter of a realized spiritual master, his understanding of the Supreme is simply foolishness. However, one can fully understand the transcendental Lord by service and devotion. When Lord Caitanya offenselessly chanted the Hare Krsna mantra, He declared that the mantra could at once deliver a conditioned soul from material contamination. In this age of Kali there is no alternative to chanting this maha-mantra. It is stated that the essence of all Vedic literature is the chanting of this holy name of Krsna:
Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare
Hare Rama, Hare Rama, Rama Rama, Hare Hare.
Lord Caitanya also told PrakasanandaSarasvati, “In order to convince Me about this essential fact of Vedic knowledge, My spiritual master has taught Me (a verse from Brhan-naradiya Puraṇa[38.126].)
Harer nama harer nama harer namaiva kevalam
kalau nasty eva nasty eva nasty eva gatir anyatha:
[Adi 17.21] In this age of quarrel and hypocrisy, the only means of deliverance is the chanting of the holy name of the Lord. There is no other way. There is no other way. There is no other way.” (Pg no-201 – Last Para)
From,
Chapter 18: The Conversations with Prakasananda
Teachings of Lord Caitanya
– By His Divine Grace A. C. Srila Swami Prabhupada