(Kadamba Kanana Swami, 13 August, 2012, New Vraja Mandala, Spain, Srimad Bhagavatam 6.3.31)
We have doubts sometimes and we think, ‘Chanting doesn’t work! I’m trying to be a devotee for such a long time and I have been chanting for many years, almost every day but I feel that I am still the same fallen person that I always was…’
But Srila Prabhupada said, ‘By chanting the Holy Name once, it can purify more sins than one can commit in an entire lifetime!’
So, my only explanation is that it takes a little longer for us to become completely purified since we have been in this material world for unlimited lifetimes, engaging in unlimited sinful activities and now we are being purified like anything!