We get purified when we take anxiety for Krishna.
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.
Lecture onSrimad-Bhagavatam 3.26.16 — Bombay, December 25, 1974
When our hearts are softened by being purified by devotional service, we will be naturally attracted to Krishna.
Lecture on "Great devotees exhibited ecstasy but we shouldn't" – Salem – Nov'06
So this modern way of life — now we have electricity and TVs and people spend hours, instead of chanting Hare Krishna they are watching TV, spoiling their life, and having all these bad vibrations pumped into their brain. Day after day they are watching murder, rape and so many horrible things on TV. And how it pollutes the consciousness! If we chant Hare Krishna, it purifies the consciousness. Prabhupada wanted these [farm] communities, where people could live simply and chant Hare Krishna — in an ideal way.
Lecture on “Simple Life on Farm Communities” (Pula Farm, Croatia, 20 October 2000)
We should not be anxious to hear about Krishna for our entertainment or sense gratification, but for our PURIFICATION.
To purify the heart is the one and only purpose that God has created this human life.