The most hateful torment for men is to have knowledge of everything but power over nothing.

I think frugality drives innovation， just like other constraints do. One of the only ways to get out of a tight box is to invent your way out.

效率是把事情做对，效果是做对的事情。

倒置，始终倒置：将情况或问题颠倒过来。反向观察它。

A people without children would face a hopeless future; a country without trees would face a future with even less hope.

我不是那种会让我的承诺失效的人。