John 1.17

'For the law was given by Moses, but grace and truth came Jesus Christ.'

This verse sort of sums things up. The law was given by Moses, the law of God, the Law of Love. This great gift lifted mankind out of the rut of superstition and fear, and servitude to kings and idols.
Though following the Law was no guarantee of an easy life, it was clear that blessings flowed to those who who honoured God, kept the Sabbath, refrained from greed, slander and so on. The Jews of today will tell you as much.
With the Law of God there is no need for a king. God's Law trumps all others, much to the annoyance of bureaucrats and tyrants through the the ages.
Those who obey the Law have no need to fear the random anger of a king or nature god, or idol created from Man's imagination.
But the Law also condemns us in the eyes of the one perfect Living God. Our sin is only wiped clean by the sacrifice of Our Lord, the Lamb of God. This is the grace divine, wonderous and kind, of our God. And through the grace of our Lord jesus Christ, the fulness of God's great love, and his purpose is revealed to us . This is his Truth, his purpose, his wisdom, his perfection, his holiness.