Sankaracarya's Vivekachudamani 499

आरोपितं नाश्रयदूषकं भवेत्

कदापि मूढैरतिदोषदूषितैः ।

नार्द्रिकरोत्यूषरभूमिभागं

मरीचिकावारि महाप्रवाहः ॥

āropitaṃ nāśrayadūṣakaṃ bhavet

kadāpi mūḍhairatidoṣadūṣitaiḥ |

nārdrikarotyūṣarabhūmibhāgaṃ

marīcikāvāri mahāpravāhaḥ ||

(Sankaracarya's Vivekachudamani 499)

That which is superimposed by people deluded by the defects in their minds can never sully the substratum, even as the great onrush of waters perceived in a mirage can never wet the desert tract.

Those who are worldly people or ignorant cannot damage the spiritual knowledge, even its surface.

Similarly in the desert, we can see the light of the sun which called mirage, which looks like water, can never make the desert wet. “One cannot understand the value of touchstone until it turns iron into gold. With great love and affection, the pure devotee observes the Supreme Personality of Godhead, devotional service and the devotee. He observes nothing beyond the Supreme Lord. Such great devotees will not deviate from the path of devotion.