Verse 15-3, Verse 15-4

न रूपमस्येह तथोपलभ्यते

नान्तो न चादिर्न च सम्प्रतिष्ठा |

अश्वत्थमेनं सुविरूढमूल

मसङ्गशस्त्रेण दृढेन छित्त्वा || 3 ||

तत: पदं तत्परिमार्गितव्यं

यस्मिन्गता न निवर्तन्ति भूय: |

तमेव चाद्यं पुरुषं प्रपद्ये

यत: प्रवृत्ति: प्रसृता पुराणी || 4 ||

“The true form of this tree is not perceived in this world, nor its beginning, nor its end, nor its continued existence. But this deeply rooted Ashvattha tree must be cut down with the sharp axe of detachment.”

“Then one should seek the Supreme Abode from where the ancient process of creation emerged. Taking refuge in that Original Being, one does not return to this world again.”
 
 Commentary

These verses use the metaphor of a tree, called Ashvattha, to represent the phenomenal world and the cycle of existence. It states that the true nature of this world, including its origins and ultimate reality, cannot be comprehended through ordinary perception. To transcend the cycle of birth and death, one must detach oneself from the attachments and desires associated with the material world. Just as a tree needs to be cut down at its root to be fully removed, one needs to sever their attachment to the material world through detachment. By doing so, one can seek the Supreme Abode, the ultimate reality, from which the entire cosmic process of creation and manifestation originated. This Abode is identified as the Supreme Lord or the divine source of all existence. Taking refuge in this original being leads to liberation, breaking the cycle of repeated births and deaths. The verse underscores the importance of detachment, seeking spiritual refuge, and attaining the ultimate state of liberation. It urges individuals to go beyond the transient and illusory nature of the material world and strive for union with the eternal and divine.