One may very easily practice chanting and hearing the holy name of the Lord and thus become ecstatic in spiritual life. The Padma Purana states,

namaparadha-yuktanam
namany eva haranty agham
avisranti-prayuktani
tany evartha-karani ca

Even if one chants the Hare Krsna mantra offensively, one can nullify these offenses by continuously chanting without deviation. One who becomes accustomed to this practice will always remain in a pure transcendental position, untouchable by sinful reactions.

A devotee’s duty is to chant the Hare Krsna mantra. One may sometimes chant with offenses and sometimes without offenses, but if one seriously adopts this process, he will achieve perfection, which cannot be achieved through Vedic ritualistic ceremonies of atonement.

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From: The Second Chance, ch 22, The Glories Of the Holy Name