Here is something for my futurist friends to consider. Some hold that the Kingdom of God is yet to come. Some also state that there's a difference between the Kingdom of God, and the Kingdom of Heaven. But they are the very same thing, for God is of Heaven.
Now, if we are awaiting a kingdom to be received, then how do you explain this simple little passage?
15 Then they also brought infants to Him that He might touch them; but when the disciples saw it, they rebuked them. 16 But Jesus called them to Him and said, “Let the little children come to Me, and do not forbid them; for of such is the kingdom of God. 17 Assuredly, I say to you, whoever does not receive the kingdom of God as a little child will by no means enter it.”
How can a child receive a kingdom that has not yet come? Yet here is Christ telling the Apostles not to forbid children from entering into the Kingdom of God. For He says,m "Let the little children come to Me, and do not forbid them; for of such is the kingdom of God."
When we were first saved, we entered the Kingdom of God as a child; a reborn child of God. And having received the gift of the Holy Spirit, we like newborn babies, were fed by the milk of God's word. Thus we who have been reborn, enter into the Kingdom of God.
Now as I've stated, some will try to separate this as though the kingdom of Christ, heaven, or God are three separate kingdoms. But that's just plain foolish. For Christ is of God, and God is of heaven; thus the same kingdom is ruled by the one true God, who sits in heaven upon His throne of judgment and grace. Thus we who abide on their earth are born into God's kingdom. And we who depart this earth, and found in Christ, are in God's kingdom of eternity, in the heavens.
The kingdom of God a future kingdom to await? Not according to scripture.
Now for those who want to say that the kingdom of God is our rebirth within the Church (and they would be correct), but that the Kingdom of Heaven is a future thing? Then they must also explain this passage:
And from the days of John the Baptist until now the kingdom of heaven suffers violence, and the violent take it by force.
As you can see, the Kingdom of Heaven existed even before Christ, in the establishment of the first Covenant. The New Covenant would be the fulfillment of all that had been written under the Old Covenant, thus eternally establishing the Kingdom of Heaven, which is of God and of Christ.
As I've just shown, they are all the same kingdom; there is no separation or distinction. Those who try to distinguish the phrases, "Kingdom of God/Heaven/Christ", are doing so to their own error and shame.
Oh, and to prove to my Futurists who try to distinguish the Kingdom of God to the Kingdom of Heaven, as though they were two separate things, let us consider Matthew's quote of children coming to Christ and compare this to Luke 18:
But Jesus said, “Let the little children come to Me, and do not forbid them; for of such is the kingdom of heaven.” 15 And He laid His hands on them and departed from there.
Wow! Same event but Luke uses the phrase "Kingdom of God", while Matthew uses the phrase "Kingdom of Heaven". As I have indicated, they are the very same thing.