Conditioned by the material energy of the Lord, we often tend to judge people and things on the basis of their physical appearance. However, things are not always what they may look like. And therefore, Srila Rupa Goswami, in the sixth verse of Sri Upadeshamrtia, is instructing us to be very careful and not judge the spiritual advancement of vaishnavas from a materialistic view point. We should never consider the complexion, bodily features, or the family in which a devotee is born, to understand their spiritual level. The only measurement to check one’s advancement is the amount of sincere love that they have for the Supreme Personality of Godhead. Srila Rupa goswami is therefore saying that just like the Ganges water is not considered polluted even when there are bubbles appearing in it during the raining season but is rather always consider most pure, being the water mixed with the dust from the lotus feet of the Lord, similarly, the vaishnavas, regardless of their bodily appearance or family lineage, are always most worshipable. Thus one should always be very careful to avoid any offences due to our materialistic vision and always seek the association of pure devotees, not taking any material factors into consideration. Srila Haridas Thakur is an excellent example. Although born in a muslim family, Sri Chaitnya Mahaprabhu proclaimed him to be the Naamacharya, as he was fully absorbed in chanting the holy names of the Lord, and therefore his family of birth was of no significance. In order to thus instruct people in this matter, Srila Rupa goswami has given the following verse:
dṛṣṭaiḥ svabhāvajanitairvapuṣaśca doṣair na prākṛtatvamiha bhaktajanasya paśyet gańgāmbhasāḿ na khalu budbudphenapańkair brahmadravatvamapagacchati nīradharmaiḥ
Being situated in his original Krsna conscious position, a pure devotee does not identify with the body. Such a devotee should not be seen from a materialistic point of view. Indeed, one should overlook a devotee’s having a body born in a low family, a body with a bad complexion, a deformed body, or a diseased or infirm body. According to ordinary vision, such imperfections may seem prominent in the body of a pure devotee, but despite such seeming defects, the body of a pure devotee cannot be polluted. It is exactly like the waters of the Ganges, which sometimes during the rainy season are full of bubbles, foam and mud. The Ganges waters do not become polluted. Those who are advanced in spiritual understanding will bathe in the Ganges without considering the condition of the water.