时光无情却不似你无心
[shí guāng wú qíng què bù sì nĭ wú xīn]
The phrase 'Time is heartless but not as heartless as you are'. This expresses sorrow over someone's callousness, suggesting that even though time moves on without regard for individuals (a common metaphor), that pain is nothing compared to being hurt by the one who's indifferent towards the speaker.