as knowing this, that law is not made for a righteous man, but for the lawless and insubordinate, for the ungodly and sinners, for the unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,
An interesting point. You see, a righteous man does not need any law. A man who lives by good principles doesn't need laws; you don't have to tell that man what he should do and shouldn't do. He does them because he is a righteous man; he is a principled man. The law is for unprincipled people, and there are a lot of those in the world. And thus we need laws to keep them in check.