Why does it feel so good to speak the harsh truth to someone...?

It's called denial. Sometimes people try to act like their so good or better then everyone else. Everyone's made mistakes in their lives. When you try and confront people about the wrong that they've done, they try and flip the script on you because they don't want the truth about them to be shown. It feels good to unload everything you've been holding back because it's sorta like a weight off your shoulders, a free space in your mind.. Some people just won't get it, some will.