善良是个害人的东西心软是个治不好的病
[shàn liáng shì gè hài rén de dōng xī xīn ruăn shì gè zhì bù hăo de bìng]
Expressing that kindness ('goodness') can sometimes cause problems and harm others, whereas a tender heart is an irreversible character trait. This phrase implies cynicism towards always treating others well as potentially damaging.