Nature alone does every kind of action. Action, by definition, is within the realm of nature. One who sees this sees that i am not the doer. I am the witness of actions going on in nature. The ego feels that it does all these things. Why does it feel that that's its function? Again, vedanta sara aviman atmicaanta karnavitia hankara,. ego is that which is of the nature of appropriation.
Inspired by the 15th chapter of the Ashtavakra Gita, Swami Sarvapriyananda gives a discourse on the nature of the Self.