心软是捅自己心脏的尖刀
[xīn ruăn shì tŏng zì jĭ xīn zàng de jiān dāo]
'Being Soft-Hearted Is A Sharp Knife Through My Own Heart'. Using metaphors of pain and self-harm, it portrays inner torment or conflict brought about by being overly compassionate or sensitive in situations that may require harder choices.