Śrīmad-Bhāgavatam 7.9.41
—
Māyāpura, March 19, 1976
This is only medicine. To become free from the infection, this harer nāma is the only medicine, bhavauṣadhi. Auṣadhi means medicine. Parīkṣit Mahārāja said, harer nāma, this chanting of Hare Kṛṣṇa, is not meant for the conditioned soul, because as soon as one chants Hare Kṛṣṇa mahā-mantra, he immediately becomes free from the contaminous, contagious position. There is a verse, eka hari nāme yato pāpa hare, pāpī haya tato pāpa karti bare nāre (?). Once chanting of Hare Kṛṣṇa mantra is so powerful that all the sinful reaction of life—immediately gone.
You have read the life of Ajāmila. He was very, very sinful. He committed so many sinful activities. But at the last moment he simply chanted Nārāyaṇa. Immediately he became free. Immediately Viṣṇudūta came to rescue him from the hands of the Yamadūta. Just see what is the power of chanting the holy name of... So this is fact, that if we chant Hare Kṛṣṇa we immediately become free from all contamination of this material world, provided we don't commit it again. That is required, that... We finish all the resultant action of contamination of this material life, provided we remain without being fallen again. Therefore there is daśa-vidha-nāmāparādha. You know ten kinds of offenses. So if you chant Hare Kṛṣṇa mantra being careful not to commit the ten kinds of offenses, then you are immediately liberated. The most dangerous offense is nāmnād balād yasya hi pāpa-buddhiḥ. If we think that "I am so fortunate. I have got this hari-nāma and it can vanquish all kinds of sinful reaction, so very good instrument. So I go on committing all kinds of sinful activities and chant Hare Kṛṣṇa. Then it will be neutralized," this is the most dangerous offense. Nāmnād balād yasya hi pāpa-buddhiḥ. Because I am chant... "I know that by chanting Hare Kṛṣṇa I shall be free from all resultant action of sinful..., so let me go on, and throughout whole day I shall commit all kinds of sinful activities and in the evening I shall chant Hare Kṛṣṇa. Then everything will be finished." This rascaldom is very, very dangerous. We must be very careful. Don't take Hare Kṛṣṇa mantra as an instrument to neutralize your sinful activities. Don't take it. It is a fact that as soon as you are initiated with Hare Kṛṣṇa mantra, you become free, but don't commit it again.