知足常乐者最富有，因为知足本身就是天然的财富。
The highest purpose is to have no purpose at all. This puts one in accord with nature in her manner of operation.
To be a poet is to have a soul so quick to discern, that no shade of quality escapes it.
幸福就像一只蝴蝶：你越是想抓住它，它就越飞走。但如果你停止追逐，它可能会落在你身上。
逻辑学的研究是关于正确推理原则的研究。