In this way there is a chain of sinful activities and their concomitant distresses, and the conditioned soul is suffering life after life due to these sins. He is suffering in the present life the results of sinful activities from his past life, and he is meanwhile creating further sufferings for his future life. Mature sinful activities are exhibited if one is suffering from some chronic disease, if one is suffering from some legal implication, if one is born in a low and degraded family, or if one is uneducated or very ugly.
There are many results of past sinful activities for which we are suffering at the present moment, and we may be suffering in the future due to our present sinful activities. But all of these reactions to sinful deeds can immediately be stopped if we take to Kṛṣṇa consciousness. As evidence for this, Rūpa Gosvāmī quotes from the Śrīmad-Bhāgavatam, Eleventh Canto, 14th Chapter, 18th verse. This verse is in connection with Lord Kṛṣṇa's instruction to Uddhava, where He says, "My dear Uddhava, devotional service unto Me is just like a blazing fire which can burn into ashes unlimited fuel supplied to it." The purport is that as the blazing fire can burn any amount of fuel to ashes, so devotional service to the Lord in Kṛṣṇa consciousness can burn up all the fuel of sinful activities. For example, in the Gītā Arjuna thought that fighting was a sinful activity, but Kṛṣṇa engaged him on the battlefield under His order, and so the fighting became devotional service. Therefore, Arjuna was not subjected to any sinful reaction.
Śrīla Rūpa Gosvāmī quotes another verse from the Third Canto of Śrīmad-Bhāgavatam, 33rd Chapter, 6th verse, in which Devahūti addresses her son, Kapiladeva and says, "My dear Lord, there are nine different kinds of devotional service, beginning from hearing and chanting. Anyone who hears about Your pastimes, who chants about Your glories, who offers You obeisances, who thinks of You and, in this way, executes any of the nine kinds of devotional service—even if he is born in a family of dog-eaters (the lowest grade of mankind)—becomes immediately qualified to perform sacrifices." As such, for anyone who is actually engaged in devotional service in full Kṛṣṇa consciousness, how is it possible that he has not become purified? It is not possible. One who is engaged in Kṛṣṇa consciousness and devotional service has without doubt become freed from all contaminations of material sinful activities. Devotional service therefore has the power to actually nullify all kinds of reactions to sinful deeds. A devotee is nevertheless always alert not to commit any sinful activities; this is his specific qualification as a devotee. Thus the Śrīmad-Bhāgavatam states that by performing devotional service a person who was born even in a family of dog-eaters may become eligible to take part in the performance of the ritualistic ceremonies recommended in the Vedas. It is implicit in this statement that a person born into a family of dog-eaters is generally not fit for performing yajña, or sacrifice. The priestly caste in charge of performing these ritualistic ceremonies recommended in the Vedas is called the brāhmaṇa order. Unless one is a brāhmaṇa, he cannot perform these ceremonies.
A person is born in a brāhmaṇa family or in a family of dog-eaters due to his past activities. If a person is born in a family of dog-eaters it means that his past activities are all sinful. But if even such a person takes to the path of devotional service and begins to chant the holy names of the Lord—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare—he is at once fit to perform the ritualistic ceremonies. This means that his sinful reactions have immediately become neutralized.
It is stated in the Padma Purāṇa that there are four kinds of effects due to sinful activities, which are listed as follows: 1) the effect which is not yet fructified, 2) the effect which is lying as seed, 3) the effect which is already mature, and 4) the effect which is almost mature. It is also stated that all these four effects become immediately vanquished for those who surrender unto the Supreme Personality of Godhead, Viṣṇu, and become engaged in His devotional service in full Kṛṣṇa consciousness.