数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
自信不是"他们会喜欢我"，而是"他们不喜欢我也没关系"。
The world needs more forests, not fewer.
Leadership is about making tough decisions today that will benefit generations tomorrow.
"Emotions exist for the sake of action."