My brothers and sisters, do you with your acts of favoritism really believe in our glorious Lord Jesus Christ? For if a person with gold rings and in fine clothes comes into your assembly, and if a poor person in dirty clothes also comes in, and if you take notice of the one wearing the fine clothes and say, "Have a seat here, please," while to the one who is poor you say, "Stand there," or, "Sit at my feet," have you not made distinctions among yourselves, and become judges with evil thoughts? Listen, my beloved brothers and sisters. Has not God chosen the poor in the world to be rich in faith and to be heirs of the kingdom that he has promised to those who love him? But you have dishonored the poor. Is it not the rich who oppress you? Is it not they who drag you into court? Is it not they who blaspheme the excellent name that was invoked over you? You do well if you really fulfill the royal law according to the scripture, "You shall love your neighbor as yourself." But if you show partiality, you commit sin and are convicted by the law as transgressors.
"If you show partiality you commit sin." Fulfilling the law to love our neighbor as ourselves prohibits us from showing favoritism or giving preferential treatment to those in our same socio-economic class, color or any other category.
Showing partiality means we are being "judges with evil thoughts." It is so ingrained in us to do so, though, especially in the ultra wealthy West, that we're not even aware we do. So the name "evil judge" shocks us. It takes a sincere commitment to return to daily and constant prayer to become aware of just how far off the path we have gotten.