良心凉心
[liáng xīn liáng xīn]
In Chinese, 良心 (good conscience) refers to someone who behaves ethically or morally, and 凉心 means ‘cooling of the heart', implying losing passion or becoming disenchanted. Thus, 良心凉心 implies that someone originally possessed high moral integrity or hopefulness but now expresses feeling disillusioned with others' actions or societal issues.