城市人工制品是一件艺术品，也是一份历史文献。
The urban artifact is a work of art and a historical document.
个人的总是政治的，政治的总是个人的。
To speak ill of others is a dishonest way of praising ourselves.
要将一个国家从最低级的野蛮状态带到最高度的富裕，所需的几乎只有和平、低税收和较为合理的司法管理。
Our wisdom comes from our experience， and our experience comes from our foolishness.
Every mathematical problem is a puzzle waiting to be solved, and every solution is a step towards greater understanding.
