Proverbs 29:27 “An unjust (unrighteous) man is an abomination to the just (righteous): and he that is upright in the way is abomination to the wicked (actively bad person).”
I have enclosed the Strong’s Hebrew and Greek Dictionaries word meanings for the English words in parentheses in the verse to make the verse easier to read and more readily understandable. Definitions elaborated on appear below.
Abomination (H8441) – AMG’s Complete Word Study Dictionaries says this Hebrew word is primarily understood in the context of the Law, i.e. unclean food, child sacrifice, idolater’s activity, Israel’s intermarriage in a national context to a false religion, and homosexual behavior (Deut. 14:3, 12:31, Isa. 41:24, Mal. 2:11, Prov. 21:27). Then in an even broader sense, it means anything offensive (Prov. 8:7).
Thus anything contrary to God’s way is an abomination to the just, whereas anything contrary to the wicked’s way is an abomination to the just.
Upright (H3477) – right, just, righteous, right, straight, equity. Typically used in the context of right ethics. There was an ancient book called by this Hebrew Jashar or the book of the Upright which is now lost (Joshua 10:13, 2 Sam. 1:18).
Way (H1870) – the journey of life, conversation, custom, manner, pathway.
The unjust and the just are like good and evil that oppose each other. These qualities are each empowered by two opposing forces God and the devil. Each person has the choice of whether they are going to be on God’s team or the devil’s team. As Christians, we need to conduct ourselves as good soldiers of Christ. We do not hate the sinner, but we do hate the sin. We see this truth brought out in Prov. 29:10 which says, “The bloodthirsty hate the upright, but the just seek his soul.” The word “seek” means to search out in prayer, ask, beg, beseech, desire, request. Though the wicked hate the righteous, the righteous seek their salvation, despite the offensiveness of a sin scarred life. Do you hate sin as God hates it, but love sinners as God loves them? As an abomination to the wicked, Christians ought to expect persecution as they seek to live Godly lives (2 Tim. 3:12).
Romans 12:9 “Let love be without dissimulation. Abhor that which is evil; cleave to that which is good.”