The best books are those that tell you what you know already.

出自先秦《荀子·性恶》引古语。不知儿子的为人，看看他的朋友就清楚了；不知国君是否贤明，看看他左右的大臣是什么德行就知道了。

The human voice is the most beautiful instrument of all, but it is the most difficult to play.

建筑不是关于风格，而是关于实质。