The Kingdom of God is already come, and Jesus Christ is the door to the Kingdom. And faith is the action that we take to enter that door. Faith is an action word. "By whom also we have access by faith into this grace wherein we stand, and rejoice in hope of the glory of God." Faith gets us access into the grace of God. The moment we believe, we step into and access the Kingdom of God. Now we often speak about Christ in us. Letting Him come into our hearts and be Lord of our lives. But that's just half of the story. We must also be in Christ. "If any man be in Christ, he is a new creature.." And it is faith also that gets us in Christ. Now Christ is the Word of God. So entering Christ basically means that we enter His word, the Bible! The Lord said, "I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture." It's like stepping into a raft by the river and the raft is taken by the current to wherever ...
Jesus is the way, the truth and the life. First you will find the way, then the truth, then you will find life. Life is the ultimate destination.