All things excellent are as difficult as they are rare.
所有卓越的事物都与它们的稀有性一样困难。
我们以为我们有这么多问题。我们怎么知道我们是幸福的？
The only thing that can make you successful is your own effort.
释义：古往今来的多少事，都付之于人们的谈笑中。
Security is always excessive until it's not enough.
可持续性不是一种选择，而是一种责任。