The works of Ādi Śaṅkarācārya

Taittirīyopaniṣadbhāṣyam

Verse 27

यतो वाचो निवर्तन्ते ।अप्राप्य मन-सा सह ।आनन्दं ब्रह्मणो विद्वान् ।बिभेति कुतश्चनेति ।एत ँ ह वाव न त-पति ।किमह ँ साधु नाकरवम् ।किमह ँपापमकरवमिति ।स य एवं विद्वानेतेआत्मान ँ स्पृणुते ।उभे ह्येवैष एते आ-त्मान ँ स्पृणुते ।य एवं वेद ।इत्युपनि-षत् ॥ १ ॥

In plain words

That from which all words turn back, along with the mind, unable to reach it—knowing that bliss of Brahman, a person fears nothing at all. Such a knower is never tormented by thoughts like, 'Why did I fail to do what is good? Why did I commit what is wrong?' One who knows this truth looks upon both virtue and sin as the Self, and redeems them both. Indeed, the one who knows thus strengthens the Self. This is the secret, sacred teaching.

Close to the Sanskrit

From which words return, not having reached, together with the mind; knowing the bliss of Brahman, he does not fear from anything. This [regret] indeed verily does not burn him: 'Why did I not do good? Why did I do evil?' He who, knowing thus, delivers these two as the Self; indeed, surely this one delivers these two as the Self, who knows thus. Thus is the Upanishad.