一个人若不能治理自己，便不能治理家庭；若不能治理家庭，便不能治理城市；若不能治理城市，便不能治理国家。

The only true voyage of discovery would be not to visit strange lands but to possess other eyes.

The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.

Imitation is the safest form of innovation.

几何不仅仅是关于形状；它是关于理解我们生活的空间及其内部的关系。