When Jesus announces the Kingdom of God he speaks to us in Parables, proclaims the beatitudes, teaches the gifts. But what is with precision this teaching?
The kingdom of God is not an institution, it is not the Church, it is something else. The Kingdom of God is about how to live.
Also it has nothing to do with virtue. The good and virtue are not the same. There is the "just injustice."
The Ten Commandments are non-compliant. What happens when truth and life are opposed? Necesarilly we must violate the nine commandment, "you shall not bear false witness against your neighbor".
The Kingdom of God has no relation with the commandments, these have no effect in life's grace, do not define good or evil, like virtue.
The Good is a spiritual gift, a perfection. We sin or live righteously as in the parable of the Good Samaritan.
The spiritual gifts are perfections, God is the source of the perfections we observe in creation and when these perfections are manifested among men, the kingdom of God arises.
Mercy, constancy, continuous improvement, the gift of counsel  are the highest virtues of its own genre, they are perfections. The preaching of Jesus is a mystical teaching because the most perfect gifts are infused, that is to say, they are not acquired by studying, practicing or habit as it happens with the natural virtues like prudence and justice, that' s why we talk about the gifts of the spirit.
The highest expression of the Kingdom of God is the righteously life, "act always by principles", the communion that is the social order established by God is the empire of the righteousness: do unto others as you would like them  do unto you, Matthew 7:12.
The empire, the dominion, the kingdom of the wisdom is to seek the perfections of God, to seek the correct and the best, to correctly discern between the good and the bad and to make edifying decisions.
In this consists the blessed life, to live the spiritual gifts received from God. Spiritual life is resume in this teaching: "Be perfect as God is perfect", Matthew 5:48.
The Kingdom of God is not a doctrine for heretics, that is, for teachers of the error, but for doctors of wisdom, for persons qualified by the divine for the teaching of wisdom.