We can say things with words； and we can do things with words.
我们可以用言辞说出事情，也可以用言辞来实现事情。
I have never been able to write a happy play. I can't. I can write a funny play, but I can't write a happy play.
The best way to be happy is to give.
诗歌必须始终具有道德目的；它应该在愉悦的同时教导。