情深似海诋不过时光蹉跎
[qíng shēn sì hăi dĭ bù guò shí guāng cuō tuó]
Roughly means 'Though love is deep like the ocean, it can't surpass time's wear and tear'. Acknowledging how powerful and enduring emotions may seem at present, yet ultimately recognizing that over long periods they change or diminish.