Verse 38

ज्ञानस्यापरिपूर्णत्वान्न शक्रोषि मनोभ्रमम् ।विनिवारयितुं मेघमसम्यग्यत्नवानिव

In plain words

Because your knowledge is not yet complete, you cannot hold back the mind's delusion -- like one who strives, but not rightly, to keep back a cloud.