Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.
We must balance energy supply with environmental protection.
The most beautiful music comes from the heart.
治理天下的人，就像牧马的人一样，关键是要除去害群之马。
There are many Beths in the world, shy and quiet, sitting in corners till needed, and living for others so cheerfully that no one sees the sacrifices till the little cricket on the hearth stops chirping, and the sweet, sunshiny presence vanishes, leaving silence and shadow behind.
公司里最重要的是人。如果你在这方面做不好，其他一切都无关紧要。