天若有情天亦老
[tiān ruò yŏu qíng tiān yì lăo]
A line derived from Chinese classical literature, it means: 'If heaven (metaphorically referring to time or fate) had emotions, even immortals (which represent everlasting things) would age'. The meaning is that nothing is eternal when emotions are involved. Time can change all things, expressing deep emotions and changes caused by them.