对来自学生的批评应该本着友好的精神来接受，学习材料的积累不应该扼杀学生的独立性。
——斯图尔特给年轻一代的人生建议。
If you can avoid seeking approval of others， your power is limitless.
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
