A tranquil mind is the source of health.
The more we try to control the world, the more it slips through our fingers.
Teachers are the most important role models in schools, the most instructive examples, and the most vivid examples for students.
历史不仅仅是关于日期和事件，而是关于经历过它们的人们。
The only way to learn mathematics is to do mathematics.
