Bhagavad Gita 4.38

न हि ज्ञानेन सदृशं पवित्रमिह विद्यते।तत्स्वयं योगसंसिद्धः कालेनात्मनि विन्दति॥

na hi jñānena sadṛśaṃ pavitramiha vidyate |tatsvayaṃ yogasaṃsiddhaḥ kālenātmani vindati ||

Verily, there is no purifier in this world like knowledge. He who is perfected in Yoga finds it within the Self in due time.

There is nothing in the world so purifying as wisdom; and he who is a perfect saint finds that at last within himself.

Our plain-language meaning of this verse is waiting for scholar review.