What shall we say then? Is there unrighteousness with God? God forbid.
Romans 9:14

KJV translates adikia as “unrighteousness”, but injustice or unlawfulness would be as good. It isn’t just that God is the Law-Maker, but that the Law is a reflection of God’s own character. His instructions aren’t arbitrary. The form of every commandment is dictated by the form of the God who gave it.

Although the Law isn’t for his benefit and is tailored to our needs, we are made in God’s image, so that the Law is the written outline of God’s predestination of the believer to be transformed into the image of Christ.