人心难测人狗难辨
[rén xīn nán cè rén gŏu nán biàn]
It's saying that 'the heart of a human being is hard to understand, sometimes even difficult to differentiate from a dog’. The name shows deep disillusionment with society or individuals, implying difficulty in discerning genuine intentions behind human behaviors and actions, potentially hinting at a lack of trust or a feeling of deceit around oneself.