In the Old Covenant there is the promise of a land — a physical land in the flesh called Canaan. The children of Israel fought to get this land, fought to expand what they have gotten of this land, fought to keep what they have already acquired. But in the New Covenant Christ is our land, he is the covenant promise given to us. So we have to fight to have him.
"And who was it who rebelled against God, even though they heard his voice? Wasn’t it the people Moses led out of Egypt? And who made God angry for forty years? Wasn’t it the people who sinned, whose corpses lay in the wilderness? And to whom was God speaking when he took an oath that they would never enter his rest? Wasn’t it the people who disobeyed him? So we see that because of their unbelief they were not able to enter his rest... So let us labor to enter that rest. But if we disobey God, as the people of Israel did, we will fall." (Heb 3:16-19;4:10).
The author of the book of Hebrews was comparing rest in the promised land of the Old Testament people to rest in Christ for the New Covenant people. Just as they struggled and fought to have the land and enjoy God's rest in it, we must also labor and fight to have the fullness of Christ and find rest in him. Again, in the spirit all these things are already perfected. The struggling and laboring only exist in the flesh; we are fighting in order to have this reality manifest in our flesh. We not only fight to have the land, we also fight to expand and keep it.
Yes, there is a war going on out there, the devil and darkness are fighting to stop us from manifesting Christ in our flesh, they are fighting to stop us from becoming filled with Christ, they are fighting to stop us from spreading Christ and letting him fill all things with himself. Our land is an ever expanding land, it continues to expand till it fills all things. But the devil will not have that; he would not have Christ manifesting in this world, he would not have Christ filling all things, he would do anything in his power to stop that from happening. Can you see that we are faced with a war, a battle for the land. We are fighting for our land, to have our land fill everywhere and cover the whole earth.
"As you watched, a rock was cut from a mountain, but not by human hands. It struck the feet of iron and clay, smashing them to bits. The whole statue was crushed into small pieces of iron, clay, bronze, silver, and gold. Then the wind blew them away without a trace, like chaff on a threshing floor. But the rock that knocked the statue down became a great mountain that covered the whole earth." (Dan 2:34-35).
The rock struck the works of the devil; every of his strategies, his struggle and resistance, struck and crushed by the rock, and then this same rock continues to grow till it covers the whole earth. This is what we are here for, to crush the resistance of the devil, to bring him to his knees and expand Christ, allowing him fill all things, and cover the whole earth. Can't you see our mission right before you, we are soldiers at war, we are a people, an army, organized to take down the resistance, and continue to spread till Christ fills everything.
Let every heart become filled with Christ, let the society be filled with Christ, let the government be filled with Christ, let every institution in the country be filled with Christ, let Christ spread from one country to another, from one continent to another, till he fills all things. Don't look at me, I didn't come up with these things, it is there in the scripture, this is our mission. Get on it, give yourself to it, let God have His beloved Son fill the whole earth.
An excerpt from my book — Christ; The Christian Spirituality