The most important thing in mathematics is to understand the concepts, not just to memorize formulas.

To change one's life: Start immediately. Do it flamboyantly. No exceptions.

书籍是灵魂的镜子。

Hustle hard, die last.

中国石化要发挥全产业链优势，为国家能源安全作出更大贡献。

抱最好的希望，做最坏的打算。

教育的艺术必须是引导孩子达到能够自我教育的程度。