'Kingdom of God' in the Bible

But seek first the kingdom of God and his righteousness, and all these shall be superadded unto you.

but if I by the Spirit of God cast out devils, then certainly the kingdom of God is come unto you.

and again I tell you, It is easier for a camel to pass through the eye of a needle, than for a rich man to enter into the kingdom of God.

Now which of the two did the will of his father? They say unto Him, The first. Jesus replied, Verily I say unto you, that publicans and prostitutes enter into the kingdom of God before you:

Therefore I tell you, that the kingdom of God shall be taken from you, and given to a nation, that will bring forth the fruits thereof.