Jīva Gosvāmī has discussed this verse in this way, that "Even a caṇḍāla, a person born in the family of dog-eaters, if he chants the holy name of the Lord, he becomes so purified that immediately he becomes eligible to operate sacrificial, ritualistic ceremony." So Jīva Gosvāmī has commented in this connection that a boy, a child born in the brahmin family, in order to accept him as real brahmin . . .
He's born in a pure family. That's all right. But there are other ceremonies, reformatory ceremonies, and this thread ceremony is also one of the ceremonies. So even taking birth in the brahmin family, he has to undergo the ceremonies to come to the stage of a pure brahmin.
But here, chanting of holy name is so powerful that he does not require even dependence on those ceremonies. Immediately he becomes. Unless a person . . . a boy is born in a brahmin family, but unless he's educated, unless he's purified, he cannot be allowed to perform the sacrificial rites. That means he's dependent on these other processes. So . . . but here a devotee who is chanting without any offense, he becomes immediately purified without depending on the other purificatory process. These things are discussed.