All glories to the chanting of Hare Krsna mantra or Krsna sankirtan movement. All glories. All victory. How it is victory, all victory? If you chant this Hare Krsna mantra, then the dirty things which have accumulated in your heart due to material contamination will be cleared off. Even not immediately, it will begin to be removed.

From Srila Prabhupada’s purport to Sri Sri Siksastakam