Insularity and irascibility can't be good for your health,

Just check out what they did to these individuals:

I don't think you'd want to end up like He Who Must Not Be Named (HWMNBN...upon second thought, not the greatest acronym, but that's besides the point):



See, that's not healthy.
Wouldn't want to end up like Professor Umbridge either. She's got some problems too:




Best not to hold on to anger and resentment. She probably has high blood pressure. mmm, not good. not good.