PURPORT

One should not think that all the interactions of the physical elements, gross and subtle, that cause the transformation of mind and consciousness are working independently. They are under the direction of the Supreme Personality of Godhead. In Bhagavad-gita (15.15), Krsna says that the Lord is situated in everyone's heart (sarvasya caham hrdi sannivisto mattah smrtir jnanam apohanam ca). As mentioned herein, Supersoul (ksetrajna) is directing everything. The living entity is also ksetrajna, but the supreme ksetrajna is the Supreme Personality of Godhead. He is the witness and order giver. Under His direction, everything takes place. The different inclinations of the living entity are created by his own nature or his expectations, and he is trained by the Supreme Personality of Godhead through the agency of material nature. The body, nature and the physical elements are under the direction of the Supreme Personality of Godhead. They do not function automatically. Nature is neither independent nor automatic. As confirmed in Bhagavad-gita, the Supreme Personality of Godhead is behind nature.