原来天空没有下雨只是我掉下的眼泪
[yuán lái tiān kōng méi yŏu xià yŭ zhĭ shì wŏ diào xià de yăn lèi]
'It Turns Out That the Sky Is Not Raining, Just My Falling Tears.' Conveys profound sadness, implying one is so lost in sorrow that their own tears seem to mimic rain.