数学不是关于数字、方程、计算或算法：它是关于理解的。

The coal industry must evolve or risk becoming obsolete. Adaptation is the key to survival.

Every artist dips his brush in his own soul, and paints his own nature into his pictures.

大多数人过于专注于如何过上成功的生活，而忽视了如何过上有意义的生活。

生活似乎是用一种焦虑代替另一种焦虑，用一种欲望代替另一种欲望的过程。

You only live once, but if you do it right, once is enough.