A devotee is not afraid of going to hell if he has the opportunity to hear the glories of the Lord constantly. This is the advantage of chanting Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare. One may be put in any condition, but God gives him the prerogative to chant Hare Krishna. In any condition of life, if one goes on chanting he will never be unhappy.
Purport on Srimad Bhagavatam 3.15.49
The dog is also sleeping on the side of a street without any difficulty and the king is sleeping on the palace, very nice apartment. A Krishna conscious person, he’s also sleeping. But there are different grades. The Krishna conscious person while sleeping, is chanting Hare Krishna. This can be done. If you practice this Hare Krishna, even in sleeping you’ll chant Hare Krishna. Everything depends on practice.
Lecture on Srimad-Bhagavatam 5.5.2 — Boston, April 28, 1969
So in this Kali-yuga, if you simply chant or even if you cannot chant – because that requires little fortune — if we simply hear, that will also help us. So these centers are meant for chanting and hearing about Krishna. Simply this process, chanting and hearing, will purify our existence.
The Krishna consciousness movement is chiefly engaged in chanting the maha-mantra all over the world. Sri Caitanya Mahaprabhu introduced the congregational chanting of the Hare Krishna mantra to give everyone a chance to hear Krishna’s holy name, for simply by hearing Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare, one becomes purified (ceto-darpana-marjanam).
Chaitanya Caritamrta Antya Lila 20.12 – Purport