海不曾吃醋天有白云天不曾嫉妒海里有鱼
[hăi bù céng chī cù tiān yŏu bái yún tiān bù céng jí dù hăi lĭ yŏu yú]
It poetically expresses a sentiment of being content and not envious ('the sea doesn't get jealous over the sky having clouds nor the sky envy the sea for having fish') with a metaphor comparing the human heart to vast natural landscapes and conveys an easygoing outlook on life.