Chapter 17 Shraddha Traya Vibhaga Yoga Verse 6
Maam chaivaantahshareerastham taanviddhyaasuranishchayaan.
who dwells in the body,—know thou these to be of demoniacal resolves.
This is the continuation of the previous shloka where Lord talks about how a person who for the sake of his own benefits turns the scriptures to his favour and does things so that they can work for him. Lord Krishna in this shloka is calling them senseless, as He feels that a person who has a sense of what God is and what God desires would never do such things. In the entire process he tortures all the elements of his body and also the God who is dwelling in that body as paramatma. Lord concludes the shloka by saying that these actions have a demonical resolves to them and can never bring the right kind of result to the person.
Extending Interpretation to Mankind’s Life!
Here Lord is talking about a person who does things in the scriptures to suit to his own benefits and how it affects the body of the person as well as Him, who lives in that body. Let us take an example of a lady who for the sake of the benefit for the family or for bearing children decides to go on a fast 3 days in a week. Fasting is a ritual that was prescribed in Upanishads as a prayaschitta or penance for something wrong a person has committed. This lady who has no understanding of this and listening to a priest or a swamiji she decides to do this. Just for a second think about what she is doing and what is the purpose it is going to serve?