Undeserved praise causes more pangs of conscience later than undeserved blame, but probably only for this reason, that our power of judgment are more completely exposed by being over praised than by being unjustly underestimated.
Destructive thoughts and emotions undermine the very causes of peace and happiness. If you think clearly about it, it makes no sense to think you’re seeking happiness, if you do nothing to restrain angry, spiteful, and malicious thoughts and emotions.