The purpose of a habit is to remove that action from self-negotiation. You no longer expend energy deciding whether to do it. You just do it. Good habits can range from telling the truth， to flossing

Humanity's greatest enemy is itself.

出自先秦《荀子·荣辱》。赠人以善良之言，好比冬天的衣服一样让人感到温暖；说伤害别人的话，比用矛戟刺人还要厉害，为人说话不可太刻薄。