Iniquity defined by the Strong's Concordance -
perversity, that is, (moral) evil: - fault, iniquity, mischief, punishment (of iniquity), sin.
Iniquity manifests by the continual rejection of God's love, mercy, and obedience to His laws. This continual rejection leads to God giving them up to their faults, and they shall be judged. For example:
Romans 1:18-19, 24, 26 For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness; 19 Because that which may be known of God is manifest in them; for God hath shewed it unto them. 24 Wherefore God also gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves: 26 For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
The Ten Commandments do indeed give evidence of the character of God, for God is love. And love is the fulfilling of the law.
Romans 13:8-10 Owe no man any thing, but to love one another: for he that loveth another hath fulfilled the law. 9 For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if there be any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself. 10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.
If one claims to love their neighbor, but does commits adultery, or steals, it is evidence that they do not love their neighbor. But, if one does these things, it is evident that they do indeed love their neighbor. And God loves us, and not even God breaks His own commandments. His Son, our Lord Jesus Christ, also manifested love towards mankind, not breaking any of The Ten Commandments, and loves His Father, not breaking any of the first four commandments. And Jesus kept the law in all perfections, manifesting the perfect obedience that is to be fulfilled in us. As Jesus says, if you love Him, keep His commandments, which quotes almost directly from the second commandment.
John 14:15 If ye love me, keep my commandments.
Exodus 20:6 And shewing mercy unto thousands of them that love me, and keep my commandments.
Breaking the commandments, is not love. Murder & hate are not love, theft is not love, all sexual perversion is not love, etc. The law points all out all sin, not in the letter, but in the spirit, of which we are to serve the law of God, in the newness of Spirit, in the mind of Christ Jesus.
Philippians 2:5 Let this mind be in you, which was also in Christ Jesus:
Romans 7:12, 14, 25 Wherefore the law is holy, and the commandment holy, and just, and good. 14 For we know that the law is spiritual: but I am carnal, sold under sin. 25 I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.