Self-love， then， is a necessary principle of action.
The detective story is the normal recreation of noble minds.
Entrepreneurship is not a sprint, but a marathon.
物理学的美丽在于它能够用简单的方式解释复杂的事物。
出自先秦《荀子·劝学》。定居一定要选择适当的邻里，交游一定要接近贤士。说明要加强道德修养，就应该注意周围环境。