If we think like that, that "We have got an instrument, chanting of Hare Kṛṣṇa mantra, which nullifies or neutralizes all kinds of sinful activities. It is very good instrument. Then I go on committing all kinds of sinful activities, and sometimes I go in the temple and chant Hare Kṛṣṇa and dance," no, don't take this policy. You must stop your sinful activities. Hare Kṛṣṇa mantra has got the power to neutralize the resultant action of your all sinful activities. That's a fact. But don't accumulate again sinful activities. Then you are safe. If you take it as an instrument: "Now let me commit sinful activities and chant Hare Kṛṣṇa," then that is very dangerous. You will never be excused. Just like sometimes the Christians do. They go to the church, make some atonement, and again does the same thing next week, and again goes to the church, again atonement. This is not good.
If you make atonement for your sinful activities by some process—just like we are prescribing this process, chant Hare Kṛṣṇa—surely your sinful reaction is nullified. But don't commit it again. That is Caitanya Mahāprabhu. He delivered Jagāi-Mādhāi. They were very sinful. Sinful means they were born in a respectable brāhmaṇa family, but by bad association they became drunkard, woman-hunter, cheater and plunderer, like that. That is sinful. So Caitanya Mahāprabhu delivered them.