Katha Upanishad Verse 2.3.12

The Absolute Reality is beyond the reach of speech, mind, or physical vision. The essential prerequisite for realization is the deep, fundamental conviction that “He is.” Without this initial acceptance, how can the Truth be known?

Sanskrit Verse

नैव वाचा न मनसा प्राप्तुं शक्यो न चक्शुषा ।
अस्तीति ब्रुवतोऽन्यत्र कथं तदुपलभ्यते ॥ १२ ॥

Transliteration

naiva vācā na manasā prāptuṃ śakyo na cakśuṣā |
astīti bruvato’nyatra kathaṃ tadupalabhyate || 12 ||

Translation

Not by speech, not by mind, not by the eye, can he be attained; except in his case who says ‘He is,’ how can that be known.