天若有情天亦老人若有情人自伤
[tiān ruò yŏu qíng tiān yì lăo rén ruò yŏu qíng rén zì shāng]
'If heaven had feelings, it too would age; if people have feelings, lovers get hurt' expresses the bittersweet idea that strong emotional connections, whether between individuals or with celestial entities, come with pain due to impermanence and vulnerability.