痛苦+反省=进步

可持续发展不是选择，而是责任。

书籍就像一面镜子。如果一头驴子往里看，你不能指望一个天使会往外看。

The mind is a system for making life possible.

The more you read, the more things you will know. The more that you learn, the more places you'll go.

创造财富的根本在于生产力的不断提高。