过去是一个装满光的橱柜，你只需找到开门的钥匙。
The past is a cupboard full of light and all you have to do is find the key that opens the door.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
Writing is not just a profession; it is a way of life, a commitment to truth and beauty.
秩序是美所依赖的形状。
矿工的安全永远不应该用成本效益分析来衡量。