'Doing' in the Bible

For I don't understand what I am doing. For I do not do what I want -- instead, I do what I hate.

But now it is no longer me doing it, but sin that lives in me.

Now if I do what I do not want, it is no longer me doing it but sin that lives in me.

Rather, if your enemy is hungry, feed him; if he is thirsty, give him a drink; for in doing this you will be heaping burning coals on his head.