Bhagavad-gītā 4.38
BG 4.38
Open the full passageन हि ज्ञानेन सदृशं पवित्रमिह विद्यते । तत्स्वयं योगसंसिद्धः कालेनात्मनि विन्दति ॥३८॥
Sanskrit
na hi jñānena sadṛśaṁ pavitram iha vidyate tat svayaṁ yoga-saṁsiddhaḥ kālenātmani vindati
Translation
In this world, there is nothing so sublime and pure as transcendental knowledge. Such knowledge is the mature fruit of all mysticism. And one who has become accomplished in the practice of devotional service enjoys this knowledge within himself in due course of time.