Katha Upanishad Verse 2.3.15

When all the psychological “knots” of the heart—ignorance, ego, and worldly attachment—are sundered while living, the seeker reaches immortality. This is the core and total instruction of this ancient wisdom.

Sanskrit Verse

यथा सर्वे प्रभिद्यन्ते हृदयस्येह ग्रन्थयः ।
अथ मर्त्यो’मृतो भवत्येतावद्ध्यनुशासनम् ॥ १५ ॥

Transliteration

yathā sarve prabhidyante hṛdayasyeha granthayaḥ |
atha martyo’mṛto bhavatyetāvaddhyanuśāsanam || 15 ||

Translation

When here all the knots of the heart are sundered, then the mortal becomes immortal. Thus, much, the instruction.