I don't agree. I've seen people change many times in many ways. Only - You can't make them change. You can't be certain what will trigger the willingness to change and You can't control the manner or degree in which any person ultimately does change.
By not speaking up you are saying their behavior is ok. 2014 "There comes a time when silence is betrayal." When you know something is wrong, but you don't speak up, you become part of the problem. In honor of Martin Luther King, Jr.
23 Of The Most Awesome Things Jennifer Lawrence Has Ever Said