न हि ज्ञानेन सदृशं पवित्रमिह विद्यते।
तत्स्वयं योगसंसिद्धः कालेनात्मनि विन्दति।।4.38।।
4.38. In this world there exists no purifier comparabel to knowledge. One who becomes perfect in Yoga finds this, on his own accord, in his Self in course of time.
4.38 Na hi etc. There exists no purifier similar to the knowledge. The purity of other things is due to the touch of Consciousness and is not intrinsic. This point is not elaborated here for fear of a lengthy discussion. This purifying nature of the knowledge, one would understand for himself on reaching the stage of being perfectly enlightened.
Na hi jnaanena sadrisham pavitram iha vidyate; Tat swayam yogasamsiddhah kaalenaatmani vindati.
na—not; hi—certainly; jñānena—with divine knowledge; sadṛiśham—like; pavitram—pure; iha—in this world; vidyate—exists; tat—that; svayam—oneself; yoga—practice of yog; sansiddhaḥ—he who has attained perfection; kālena—in course of time; ātmani—wihtin the heart; vindati—finds