复杂容易，简单难。

Writing is a way of talking without being interrupted.

"The only way to get rid of a temptation is to yield to it."

The pursuit of mathematical truth is a pursuit of beauty, elegance, and simplicity.

"The only thing that is truly infinite is the human soul."

如果一个孩子要保持他与生俱来的惊奇感，他至少需要一个能与之分享的成年人的陪伴，与他一起重新发现我们生活的世界的快乐、兴奋和神秘。