Purusottama Yoga-Bhagavad Gita Chapter 15 [Realization of the Ultimate Truth]
Krishna Said > Shaloka: 3
The real form of this tree cannot be perceived in this world. No one can understand where it ends, where it begins, or where its foundation is. But with determination one must cut down this tree with the weapon of detachment.
It is now clearly stated that the real form of this banyan tree cannot be understood in this material world. Since the root is upwards, the extension of the real tree is at the other end. No one can see how far the tree extends, nor can one see the beginning of this tree. Yet one has to find out the cause. “I am the son of my father, my father is the son of such and such a person, etc.” By searching in this way, one comes to Brahma, who is generated by the Garbhodakasayi Visnu. Finally, in this way, when one reaches to the Supreme Personality of Godhead, that is the end of research work. One has to search out the origin of this tree, the Supreme Personality of Godhead, through the association of persons who are in the knowledge of that Supreme Personality of Godhead. Then by understanding one becomes gradually detached from this false reflection of reality, and by knowledge one can cut off the connection and actually become situated in the real tree.