Every experiment, whether successful or not, teaches us something valuable.

"It's important to write about difficult subjects in a way that children can understand."

我们卖的不是车，而是通往新生活方式的钥匙。

在年老之后，你会发现自己的双手能解决很多难题。一只手用来帮助自己，另一只用来帮助别人。

Freedom is the recognition of necessity.