Mind is power that makes one feel as if one is the master the work that is being done. This the illusion of ego one has to be aware of. In fact only nature works. How to get away from this illusion of doer is the most interesting quest for me...a little bit of ego and one feels that one is doing the work in fact one is not ...only nature does it again... This is where surrender of works and sacrifice come into picture. I love to do this yoga instead of all the illusions that creep in the way. Egoism is such a trickster.