解释：不可以不知道活着的乐趣，也不可以不知道虚度光阴的担忧。

True leadership means making tough decisions today that will pay off decades from now.

The true essence of a story is not in its plot, but in the emotions it evokes.

文章的最高境界，能够通达神明，但这不是可以强求达到的。

Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.

我不是科学，我是艺术。