百里情深不及他人笑颜诋毁情深似海诋毁不过时光蹉跎
[băi lĭ qíng shēn bù jí tā rén xiào yán dĭ huĭ qíng shēn sì hăi dĭ huĭ bù guò shí guāng cuō tuó]
'Deep affection cannot stand the mocking smile of others; love as deep as the sea is ultimately outmatched by the passage of time.' It suggests that strong emotions can't always withstand external influences and the passage of time.