Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

Old paint on canvas, as it ages, sometimes becomes transparent. When that happens it is possible, in some pictures, to see the original lines: a tree will show through a woman's dress, a child makes way for a dog, a large boat is no longer on an open sea. That is called pentimento because the painter 'repented,' changed his mind. Perhaps it would be as well to say that the old conception, replaced by a later choice, is a way of seeing and then seeing again.

我总是说，美丽不仅仅是外在的。它关乎你内心的东西。它关乎你的品格、你的精神和你的灵魂。

挑战是伪装的机会。

战略就是做出选择、权衡取舍；就是要有意识地选择与众不同。

元素是自然的字母表，而我们正在学习阅读。

让自己振作起来的最好方式是尝试让别人振作起来。