"But seek his Kingdom, and these things will be given to you as well", Luke 12:31

Jesus, teach to us the mysteries of the Kingdom. The expression:"But seek his kingdom, and these things will be given to you as well", Luke 12:31; is insert within a longer narrative that show to us the characteristics of the Kingdom of God.
The Kingdom of God is:
1) The happy life, the beatitudes Matthew 5:1-12
2) Salt and light of the earth (Truth and Wisdom), Matthew 5:13-16
3)Mercy and forgiveness, Matthew 21-26
4) Fidelity, Firmness Matthew 27-30
5)Perseverance, Matthew 33-37
6)Love for the good, the love perfected by the nature of the good, "love your enemies", Matthew 43-48
7)Devotion: No one can serve two masters, Matthew 5:24
8) Trust in God (Divine Providence), Matthew 5:25-34
The kingdom of God is an ethical doctrine that we can know through the description of his own characteristics. And ending as a summary: "Be Perfect as your heavenly father is perfect", Matthew 5:48.