Once Nityänanda Prabhu and Srïla Haridãsa Thäkur were walking down a main road, and on the way they saw a roaring crowd assembled. Upon inquiring from passers-by, they understood that two brothers, named Jagai and Madhai, were creating a public disturbance in a drunken state. They also heard that these two brothers were born in a respectable brãhmana family, but because of low association they had turned into debauchees of the worst type. They were not only drunkards but also meat-eaters, woman-hunters, dacoits and sinners of all description. Srïla Nityãnanda Prabhu heard all of these stories and decided that these two fallen souls must be the first to be delivered. If they were delivered from their sinful life, then the good name of Lord Caitanya would be even still more glorified. Thinking in this way, Nityãnanda Prabhu and Haridãsa pushed their way through the crowd and asked the two brothers to chant the holy name of Lord Hari. The drunken brothers became enraged upon this request and attacked Nityänanda Prabhu with filthy language. Both brothers chased them a considerable distance. In the evening the report of the preaching work was submitted to the Lord, and He was glad to learn that Nityänanda and Haridãsa had attempted to deliver such a stupid pair of fellows.
The next day Nityãnanda Prabhu went to see the brothers, and as soon as He approached them one of them threw a piece of earthen pot at Him. This struck Him on the forehead, and immediately blood began to flow. But Nityãnanda Prabhu was so kind that instead of protesting this heinous act, He said, "It does not matter that you have thrown this stone at Me. I still request you to chant the holy name of Lord Hari."
One of the brothers, Jagai, was astonished to see this behavior of Nityänanda Prabhu, and he at once fell down at His feet and asked Him to pardon his sinful brother. When Madhai again attempted to hurt Nityänanda Prabhu, Jagai stopped him and implored him to fall down at His feet.
In the meantime the news of Nityänanda's injury reached the Lord, who at once hurried to the spot in a fiery and angry mood. The Lord immediately invoked His Sudarsana-cakra (the Lord's ultimate weapon, shaped like a wheel) to kill the sinners, but Nityänanda Prabhu reminded Him of His mission. The mission of the Lord was to deliver the hopelessly fallen souls of Kali-yuga, and the brothers Jagai and Madhai were typical examples of these fallen souls. Ninety percent of the population of this age resembles these brothers, despite high birth and mundane respectability. According to the verdict of the revealed scriptures, the total population of the world in this age will be of the lowest sudra quality, or even lower. It should be noted that Sri Caitanya Mahãprabhu never acknowledged the stereotyped caste system by birthright; rather, He strictly followed the verdict of the sästras in the matter of one's svarüpa, or real identity.
When the Lord was invoking His Sudarsana-cakra and Srila Nityãnanda Prabhu was imploring Him to forgive the two brothers, both the brothers fell down at the lotus feet of the Lord and begged His pardon for their gross behavior. The Lord was also asked by Nityãnanda Prabhu to accept these repenting souls, and the Lord agreed to accept them on one condition, that they henceforward completely give up all their sinful activities and habits of debauchery. Both the brothers agreed and promised to give up all their sinful habits, and the kind Lord accepted them and did not again refer to their past misdeeds.
This is the specific kindness of Lord Caitanya. In this age no one can say that he is free from sin. It is impossible for anyone to say this. But Lord Caitanya accepts all kinds of sinful persons on the one condition that they promise not to indulge in sinful habits after being spiritually initiated by the bona fide spiritual master.
There are a number of instructive points to be observed in this incidence of the two brothers. In this Kali-yuga practically all people are of the quality of Jagai and Madhai. If they want to be relieved from the reactions of their misdeeds, they must take shelter of Lord Caitanya Mahãprabhu and after spiritual initiation thus refrain from those things which are prohibited in the sãstras. The prohibitory rules are dealt with in the Lord's teachings to Srïla Rupa Gosvãmï.
(Srimad Bhagavatam Introduction 1972 edition)