Drugs....or a change of heart !
I am not sure I agree that anything "controls" feeling. I believe there are elements that influence or affect them, but not control them. One's psyche as a whole processes many elements that produces feelings. So, I guess to answer your question I would say the following. <br />
Perceived environmental, psychological, and social events influence the type(s) of feelings a person experiences. <br />
I am sure my fortune cookie philosophy is riddled with holes so I welcome any rebuttal.