BG 4.38
न हि ज्ञानेन सदृशं पवित्रमिह विद्यते ।
तत्स्वयं योगसंसिद्धः कालेनात्मनि विन्दति ॥
तत्स्वयं योगसंसिद्धः कालेनात्मनि विन्दति ॥
na hi jñānena sadṛśaṁ pavitram iha vidyate
tat svayaṁ yoga-saṁsiddhaḥ kālenātmani vindati
tat svayaṁ yoga-saṁsiddhaḥ kālenātmani vindati
Word-for-word meanings
iha — in this world; na hi vidyate — there is nothing at all; pavitram — [as] purifying; sadṛśam — as; jñānena — wisdom; saṁsiddhaḥ — [to] one fully perfected; yoga — [through] niṣkāma-karma-yoga; tat — that [wisdom]; vindati — is discovered [i.e., revealed]; ātmani — in the self; svayam — of its own accord; kālena — in due course of time.
Translation
In this world, there is nothing at all as purifying as wisdom. To one fully perfected through niṣkāma-karma-yoga, that wisdom is revealed to the self of its own accord in due course of time.