Just as swans visit lake Mansarover, so do the righteous people with divine wisdom visit the holy congregation of Lord's loving servants/devotees.
There, at Mansarover, the swans relish pearls as their food and nothing else; so do these devotees engross their minds in the holy Naam of the Lord and remains attached with His divine words.
The swans are believed to disintegrate milk in its constituents of water and milk; while here in the holy congregation, one learns about those who are Guru-oriented and self-oriented.
The temperament of herons cannot be changed into those of swans but here in the holy congregation, those who are like filth-eating crows are transformed into holy and devoted persons through the hue of Naam blessed by the True Guru. (340)