爱到深处自然伤痛到心里自然懂
[ài dào shēn chŭ zì rán shāng tòng dào xīn lĭ zì rán dŏng]
When love reaches its deepest point, it can cause pain; when pain reaches the heart, it leads to understanding. It indicates the depth of emotion involved in a relationship, often after heartbreak.