你的心是海而我是鱼
[nĭ de xīn shì hăi ér wŏ shì yú]
An extremely romantic description where one sees themselves as small and insignificant (such as a fish) compared to the immensity of someone's heart (like the sea). Attraction to another, who may appear deep and mysterious as an ocean, and seeing oneself as part of that greater entity.