The defining characteristic of pessimists is that they tend to believe bad events will last a long time, will undermine everything they do, and are their own fault.
翻译：过去善于打仗的将领，首先做到自己不被敌人战胜，再等待时机战胜敌人。不被敌人战胜取决于自己做好准备、不犯错，是否能战胜敌人取决于敌人是否犯错。
When someone is nasty， rude， hateful， or mean with you， pretend they have a disease. That makes it easier to have empathy toward them which can soften the conflict.