Verse
न रूपमस्येह तथोपलभ्यतेनान्तो न चादिर्न च संप्रतिष्ठा ।अश्वत्थमेनं सुविरूढमूलंअसङ्गशस्त्रेण दृढेन छित्त्वा ॥
The real form of it cannot be perceived by us in this material world of man’s embodiment, nor its beginning nor its end, nor its foundation; having cut down this firmly rooted Ashwattha by the strong sword of detachment, one should seek for that highest goal whence, once having reached it, there is no compulsion of return to mortal life; I turn away (says the Vedantic verse) to seek that original Soul alone from whom proceeds the ancient sempiternal urge to action.
Gītā 15·3