BG 4.38
न हि ज्ञानेन सदृशं पवित्रमिह विद्यते
तत्स्वयं योगसंसिद्धः कालेनात्मनि विन्दति
na hi jñānena sadṛśaṃ pavitramiha vidyate
tatsvayaṃ yogasaṃsiddhaḥ kālenātmani vindati
TRANSLATION
For there is no purifier here equal to knowledge; he that is perfected in Karma Yoga finds this (knowledge) of his own accord in himself in due time.
PURPORT
Nothing here in this world purifies like this knowledge; for the knowledge of the self destroys all evil. He who has reached perfection by practising Karma Yoga in its form of knowledge daily in the manner taught, in due time, of his own accord, attains it, i.e., knowledge concerning his own self.
Shri Krishna expounds the same lucidly thus:
