Verse
ज्ञेयं यत्तत्प्रवक्ष्यामि यज्ज्ञात्वाऽमृतमश्नुते ।अनादिमत्परं ब्रह्म न सत्तन्नासदुच्यते ॥
I will declare the one object to which the mind of spiritual knowledge must be turned, by fixity in which the soul clouded here recovers and enjoys its nature and original consciousness of immortality, – the eternal supreme Brahman called neither Sat (existence) nor Asat (non-existence).
Gītā 13·13