"Anger is just sad's bodyguard" is something I can relate to in some way or another. I'm sure we've all had a time where we felt like nothing mattered, you just didn't want to commit to anything, and talking just seemed like too much effort. Though, you never voiced these thoughts. So as those around you try to talk to you when you don't want to,or wanted to take you out, you slowly get more and more frustrated, and end up taking anger out on those you cherish. It's not as though you wanted to, it's just anger was something that overruled your thoughts to express that sadness to anyone. So relating to the quote, when I'm sad, I usually get angry easily, not wanting anyone to see what emotion I'm actually feeling. It's not something I can explain very well, but it's like I'm hiding it away, protecting it from ever being shown..