It's important that we, as believers, understand the reason why we should live in the Kingdom of God. We are representatives of the King, who is Jesus. He is our head, we are His body. As His body, the government now rests on our shoulders. He calls us ambassadors in II Cor. 5:20. We are to represent Him on the earth. In doing this, we establish and extend His Kingdom here as it is in Heaven.
"For the Kingdom of God is not eating and drinking but righteousness, peace, and joy in the Holy Spirit."
"The Kingdom of God does not consist in words but in power."
"In order that in Christ Jesus the blessings of Abraham might come upon the Gentiles so that we would receive the promise of the Spirit through faith."
We not only establish and extend His Kingdom on earth but we can receive a blessing in our life at the same time. Every father wants to bless his children.
"Seek first His Kingdom and His righteousness and all these will be added to you."
We are in the world but not to be of it. If we set our mind on the things above and not on the earth, our focus will always be on His Kingdom. The power to achieve an abundant life is in us, Holy Spirit, and when our will matches His will, then His will (promises) can be done in our life. We will live in the Kingdom if we stay focused on the Holy Spirit so that He can fulfill the promises of God in our lives.