श्री भगवानुवाच
ऊर्ध्वमूलमधःशाखमश्वत्थं प्राहुरव्ययम्।
छन्दांसि यस्य पर्णानि यस्तं वेद स वेदवित्।।15.1।।
।।15.1।। श्री भगवान् ने कहा -- (ज्ञानी पुरुष इस संसार वृक्ष को) ऊर्ध्वमूल और अधशाखा वाला अश्वत्थ और अव्यय कहते हैं जिसके पर्ण छन्द अर्थात् वेद हैं? ऐसे (संसार वृक्ष) को जो जानता है? वह वेदवित् है।।
Hari OM! The nature of what is known as freedom or bondage in samsara or the perpetual cycle of birth and death is delineated in this chapter by Lord Krishna. The word urdhva means above as in superior to. The Supreme Lord is the superior quality abiding in all virtues. He is superior principle residing within the atma or immortal soul. Urdhva means paramount in all respects. The word andhah means below and is base, mundane and even vile. The branches refer to the jivas or embodied beings who are subjected to transmigration in samsara and they include the demigods also headed by Brahma who lives for billions of years. Although asvattha refers to a banyan tree another meaning is everlasting in the sense that it exists in a continuous stream without changing even though innumerable myriads of jivas are coming and going incessantly. But their coming and going does not change its nature. Whatever form and function it had in the beginning of creation that form and function it will have at all times throughout creation. So that is why it is known as everlasting and indestructible. The word chamdamsi refers to the leaves of the tree which are the aphorisms of the Vedic scriptures which propunds what actions in life are to be performed and what activities are to be performed and the results of violating or adhering to the Vedic injunctions determines the karma or reactions to actions that one will have to experience in joy or misery. These reactions are like the fruits of a tree which can never come about without the leaves. Now begins the summation. Hari! Hari OM! What was briefly mentioned in chapter 13 is now elaborated upon by Lord Krishna with further clarification. The roots being distinctly above refer to the Supreme Lord as the universal tree even as the Earth representing prakriti or the material substratum pervading physical existence is the reflection of this tree. Attributes of consciousness represent the primary roots while non-consciousness are the secondary roots. Here the Vedic association of consciousness and unconsciousness as being similar to a tree is well known. The Earth like the demigods activates the conscious and the Supreme Lord becomes the stable and eternal root. The unconscious who are base and vile are put in bondage by a great sense of false ego get attracted by their senses and attached to the elements. The chamdamsi or leaves are the karma due to activity and the fruits are desires such as name, fame, wealth and moksa or liberation from material existence. Another meaning of chamdamsi is to unseal. Thus the words of the Vedic scriptures are called chandas or that which unseals the esoteric meaning of the eternal wisdom of the Vedas.