। ॥ २० ॥
In plain words
As Ātman is discerned from Anātman in Ātma–Anātma-viveka, Jñāna—true knowledge—settles beyond doubt. Awakened by the Guru, the Śiṣya goes beyond Śabda-brahman, Brahman known through words.
Close to the Sanskrit
Through Ātma–Anātma-viveka—discernment between Self and non-Self—Jñāna becomes unwavering. The Śiṣya, awakened by the Guru, passes beyond Śabda-brahman, Brahman as word.