BG 15.2

15.2 अधः below? च and? ऊर्ध्वम् above? प्रसृताः spread? तस्य its? शाखाः branches? गुणप्रवृद्धाः nourished by the Gunas? विषयप्रवालाः senseobjects (are) its buds? अधः below? च and? मूलानि the roots? अनुसन्ततानि are stretched forth? कर्मानुबन्धीनि originating action? मनुष्यलोके in the world of men.Commentary The countless objects? large and small? which life needs are all products of the five elements through the activity of the alities. This tree of Samsara is nourished by the three alities of Nature. The senseobjects are its buds and the roots which grow downwards are the bonds of Karma for those who lead a life of passion and attachment in this world? who are under the sway of likes and dislikes. The sprouts of this marvellous tree are the charming objects of the senses with their characteristics of sound? touch? colour? taste and smell. The roots? the Karmic tendencies from the past lives? grow downwards to generate the bonds of Karma in the world of men. These roots strengthen the bondage by further actions.The primal root is ignorance from which arises the eightfold Nature -- the five elements? mind? intellect and egoism. From the stem of the tree spring four branches called Svedaja? Andaja?,Jarayuja and Udbhijja. Eightyfour lakhs (eight million and four hundred thousand) of species came into being.One branch shoots straight upwards. This is the branch of Dharma which yields the fruit of enjoyment in heaven. Another branch is the branch of dispassion which yields the fruit of Selfrealisation. The sun? the planets? the manes and the sages have also come out of this wonderful tree. Above them are the branches of the worlds of Indra and the gods. Still higher are those of the sages and the men of austerities and penance. Still higher is the Satyaloka where Hiranyagarbha dwells.From man down to the immovable objects below and from him up to the realm of the Creator above? whatever regions are attained in accordance with the nature of knowledge or action? they are the ramifying branches of the tree of Samsara. They are nurtured and fattened by the three Gunas which form their material base.The senseobjects such as sound? touch? colour? taste and smell represent the buds that sprout from the branches of the physical bodies which are the products of actions.The highest root of this wondeful tree is Brahman. The secondary roots are the latent impressions (Samskaras) of likes and dislikes? which spread in this world of men and impel them to perform virtuus and vicious actions and bind them fast to actions.Now listen to the way by which this tree can be cut off. Only he who thus cuts his bondage to this tree of Samsara can be happy even in this world. He has the highest wisdom because he stands as a spectator of this tree and knows it as it is? without being tied to it.

— vedicscriptures · exposition · source ↗

The description of the banyan tree is further explained here. Its branches spread in all directions. In the lower parts, there are variegated manifestations of living entities – human beings, animals, horses, cows, dogs, cats, etc. These are situated on the lower parts of the branches, whereas on the upper parts are higher forms of living entities: the demigods, Gandharvas and many other higher species of life. As a tree is nourished by water, so this tree is nourished by the three modes of material nature. Sometimes we find that a tract of land is barren for want of sufficient water, and sometimes a tract is very green; similarly, where particular modes of material nature are proportionately greater in quantity, the different species of life are manifested accordingly. The twigs of the tree are considered to be the sense objects. By development of the different modes of nature we develop different senses, and by the senses we enjoy different varieties of sense objects. The tips of the branches are the senses – the ears, nose, eyes, etc. – which are attached to the enjoyment of different sense objects. The twigs are sound, form, touch, and so on – the sense objects. The subsidiary roots are attachments and aversions, which are by-products of different varieties of suffering and sense enjoyment. The tendencies toward piety and impiety are considered to develop from these secondary roots, which spread in all directions. The real root is from Brahmaloka, and the other roots are in the human planetary systems. After one enjoys the results of virtuous activities in the upper planetary systems, he comes down to this earth and renews his karma, or fruitive activities for promotion. This planet of human beings is considered the field of activities.

— vedicscriptures · exposition · source ↗