जलबिन्दुभिराकाशं न सिक्तं न च शुध्यति ।तथा गङ्गाजलेनायं न शुद्धो नित्यशुद्धतः ॥ ५५ ॥
In plain words
Throw water at space: it does not get wet, and it does not get clean. So too with this Self — the Ganges cannot purify it, because it was never anything but pure.
Close to the Sanskrit
By drops of water space is not wetted, nor does it become pure; likewise, by the water of the Gaṅgā this one is not purified — because of being eternally pure.