"And seek not what ye shall eat, or what ye shall drink, neither be ye of doubtful mind. For all these things do the nations of the world seek after: and your Father knoweth that ye have need of these things. But rather seek ye the kingdom of God; and all these things shall be added unto you. Fear not little flock; for it is your Father's good pleasure to give you the kingdom." Luke 12:29-32
What does it mean to seek the kingdom? Is it that you seek after some place that you will go after you die? Is it a kingdom where Christians are in control of this world's system? Is this kingdom just a place of thought? There has been too many unanswered questions by many well-meaning leaders.
The kingdom of God is a place in your heart/mind/spirit/soul where God resides. You are in this kingdom right now if you are born again. This kingdom isn't coming as if it were never here, but it is coming in that it is always moving forward with the mind of God. Someday the kingdom of God will be free of sin and corruption. For now, the kingdom of God is the place where God resides in your life.
You don't have to earn the kingdom. You receive the kingdom from a Father who wills you to have it. And it pleases God to do so. The kingdom is free of denominational dogma. The kingdom is operated on Biblical principles that are universal. The kingdom of God has within it all that God has disposed for you to have physically and spiritually so that you can go through this life, missing nothing of eternal importance. Fulfillment is when you understand the parameters that God provided for your perfect welfare and you learn to live in it. The kingdom of God is the only place where fulfillment can take place, because in order for anyone to actualize their full potential they must be born again and have their spirit made alive by the indwelling Spirit of God.
It pleases the Father to give the kingdom to any one who will have it.