The Katha Upanishad with Shankara’s Commentary
एष सर्वेषु भूतेषु गूढोऽऽत्मा न प्रकाशते ।
दृश्यते त्वग्र्यया बुद्ध्या सूक्श्मया सूक्श्मदर्शिभिः ॥ १२ ॥
eṣa sarveṣu bhūteṣu gūḍho''tmā na prakāśate |
dṛśyate tvagryayā buddhyā sūkśmayā sūkśmadarśibhiḥ || 12 ||
This Ātman (Self), hidden in all beings, does not shine forth; but It is seen by subtle seers through keen and subtle understanding.
NOTE: Tranlsation and commentary is missing from the book.