"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.

The divine providence

Providence, as Thomas Aquinas explains, is the divine prudence, there are passages in the Bible that allude to this divine attribute (remember that a divine attribute is a non-transmissible gift or perfection): "For the pagans run after all these things, and your heavenly Father knows that you need them. But  seek first his kingdom and his righteousness, and all these things will be given to you as well" Matthew 6:32-33; and, "Oh Father, your rule eveything with Providence" Wisdom 14:3
The divine Providence is related with the Security in God or the Confidence in God. Security o Confidence in God is not fate, fate is accept the creed. Every religion has his own creed, the creed are a set of affirmation that stablish a religion.  The Security in God is directly related with the spiritual gift of Knowledge, the promise of the beatitudes, and the divine guide.
http://www.quintoevangelio.com.ar/en/articles/item/37-providence.html