Matthew 24:14
And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.

This study will answer three questions.
  1.  What is the Gospel?
  2.  Thy kingdom come - what is the kingdom?
  3.  Why for a witness - What is the significance of that statement?

What is the Gospel?
And "THIS" Gospel.  The word "this" dictates that Christ was speaking of something in particular.  The word "this" is singular, signifying that the gospel is unique, particular and specific.  Let us look at the word gospel.  What does it mean? Before we move on, we would have you understand this one principle when studying the Bible.  We should always allow the Bible to be it's own interpreter.  We should never try to interpret the Bible, because our wisdom is foolishness to God.  The answers are within its pages.  Isaiah gives us a good principle to follow in Isaiah 28:10, "For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little:"  So when we diligently search the scriptures coupled with the direction of the Holy Spirit in a prayerful attitude, the Lord will give us the interpretation thereof.  

Webster defined the word gospel as "the good news concerning Christ, the kingdom of God and salvation."  Let us know turn to the pages of the Bible for its definition.
Romans 1:9,15,16
9 For God is my witness, whom I serve with my spirit in the gospel of his Son, that without ceasing I make mention of you always in my prayers;
Paul is saying here that the gospel is about God's son.
15 So, as much as in me is, I am ready to preach the gospel to you that are at Rome also.
Paul is ready to preach the gospel.  But preach about what?
16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
We see here that the gospel is about Christ.  And why is it that Paul is not ashamed of it?  Because it is the power of God unto salvation.  This is a love story.  Paul along with God our Father, loves us all.  Paul is saying that the gospel brings salvation, so I cannot be ashamed of it.  I must herald it wherever I go.

Ephesians 3:1-8
1 For this cause I Paul, the prisoner of Jesus Christ for you Gentiles,
6 That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:
7 Whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power.
8 Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ;
Paul said in verse 6 that the Gentiles will be partakers of the promise by the gospel.  In verse 8 he explains that the gospel is the unsearchable riches of Christ.

Acts 5:42
42 And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ.
What did the apostles do?  They taught Christ and him only on a daily basis.  What does that suggest to us in our ministry, teachings and sermons?  Think about it.  Paul in           1 Corinthians 15:1-20 gives an example of how he goes about the Lord's business.
Moreover, brethren, I declare unto you the gospel which I preached
By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
3 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
4 And that he was buried, and that he rose again the third day according to the scriptures:
Paul said that the first thing that he presents is Christ and him crucified.  He presented the life and death of Jesus Christ to all people before anything else.  He understood that the Gentiles could not walk the way Jesus walked if they did not fall in love with him first.  Why would anyone follow an individual and do what they say if they do not know a thing about that person?  Moreover, consider the selling pitch of Christ, "The foxes have holes, and the birds of the air have nests; but the Son of man hath not where to lay his head.?" Matthew 8:20. It sounds like he has nothing to offer yet he wants me to follow him.  But if they get to know him they will find out different.  Love is the fulfillment of the commandment.  If we don't love him, we will not serve him.

2 Timothy 4:2
Preach the word; be instant in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine.
Preach the word is the direct charge from the Bible.  But what word, what is the word many may ask?
John 1:1,14
In the beginning was the Word, and the Word was with God, and the Word was God.
14 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
The Word is Jesus Christ.  In other words, the Bible is saying preach Christ to the people.
Philippians 1:27
Only let your conversation be as it becometh the gospel of Christ:
Preach the word, preach the gospel, preach about Jesus Christ the Bible is saying.  The gospel of Jesus Christ is the only message that will prepare this world to meet the King of the universe.  Notice the Bible did not say, the Lutheran message shall be preached in all the world for a witness.  Nor did it say the Baptist, Methodist, Pentecostal, Anglican, Presbyterian, Catholic, Jehovah's Witness, Seventh-day Adventist or any other denomination, charismatic or non-denominational message will do it.  Only the gospel of Jesus Christ.  We are not saying that the above denominations do not have a message. But the sad reality is that most people try to promote a denomination and not Christ.  

It is impossible for us to live a Christian life without the power of Jesus Christ working within us.  Many are putting the carriage before the horse.  With such an arrangement they will never move forward.  Regardless of how important we believe certain gems of truth are, the recipients of such precious information can only walk therein if Jesus Christ is the Lord of their lives.  Remember friends, we cannot do it.  We should have no confidence in self.  Christ is doing it.  Without Him we will surely fail.  The Bible says. "If I be lifted up, I will draw all men unto me."  It did not say if certain doctrines or denominations be lifted up.  No if Christ be lifted up, exalted and adored then the spirit of truth will attend your life to lead you into all truth.  

The Gospel of Christ VS The gospel of the kingdom
Matthew 24:14
And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.
The Bible says, "this gospel of the kingdom shall be preached in all the world for a witness."  That is interesting... I thought it was the gospel of Jesus Christ.  Is there a difference between "the gospel of the kingdom" and "the gospel of Jesus Christ?"  No, it is the same message.

On the stage of this great controversy between God and Satan, God is presented by Satan as a tyrant and a dictator.  His accusation is, the kingdom of God is unfair and unmerciful.
Revelation 12:7-9
7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
8 And prevailed not; neither was their place found any more in heaven.
9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.
Satan was cast out of heaven because he went against God in an attempt to take over heaven.  So he went around saying God is a tyrant.   To the entire universe he presents his sob story.  "God kicked me out of my home because I did not go along with every little thing he said.  He has a lake of fire prepared for me and he is going to destroy me.  Did you know that?  God is not love, He is not merciful, His law is not just.  He is a puppet master. He craves control and if you slip up for a second He is going to defrock you as he did me.  His kingdom is not love as He would have you to believe."  Satan had all that to say about God.  Satan might have planted seeds of doubts in the minds of the angels that remained true to God.  He might have planted seeds of doubt in the mind of the entire universe.  

So we see that there are some serious accusations on the table placed there by Satan against God and His kingdom.  But the Lord is saying to us that His kingdom is love.  What evidence did He present?  He placed Christ on the witness stand to testify through His life and death that His kingdom is love.  So Christ came preaching the kingdom of God.  Christ explained that He is one with the Father.  His works, thoughts, attitude and mission are God's.

Luke 4:43
And he said unto them, I must preach the kingdom of God to other cities also: for therefore am I sent.
Christ was saying to the people, that He was sent to preach the kingdom of God.  But what is the kingdom of God?  Let us look at other comments that Christ made about his mission on earth.
Luke 4:18-19
18 The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised,
19 To preach the acceptable year of the Lord.
We understand that the gospel is the good news about Jesus Christ.  But verse 18 says that Christ was anointed to preach the gospel.  Was he preaching about himself?  Is there another gospel?  NO!!

It is the kingdom message that He was preaching.  For God so loved the world that He gave...  Christ is saying that God is love and the kingdom of God is love.  So when John said, "Repent for the kingdom of God is at hand," he was speaking about Jesus Christ.  The kingdom of God's personified and made manifest through Christ.  Through His life and death Christ revealed to the entire universe the good news about God and his Kingdom.  In Verse 18 Christ is saying that God the Father sent Him to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind and so on.  And he explained that God was working through Him so that He could accomplish all of the above.  
John 14:8-10
8 Philip saith unto him, Lord, show us the Father, and it sufficeth us.
9 Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Show us the Father?
10 Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works.
God the Father speaking through Christ asked Philip this question, "Have I been so long time with you, and yet hast thou not known me."  Christ is saying, "It is God who is love.  It is because of his love for you that is why I am here.  It is not me who is living, but the Father working through me that enables me to feed the poor, heal the sick and cause the blind to see."  This is what the kingdom is all about.  God is love and His kingdom is come in representation of His Son to vindicate his character and through Him all might live.  The Lord is saying, "seek me and live."  Life eternal is to know God the Father and Jesus Christ whom He hath sent.  God is the one that is behind everything through His Son that all might have life and have it abundantly. So Christ preached the gospel and the gospel of the kingdom the Bible says, which is God's story.  Now, after getting a living testimony, a tangible example in representation of God's kingdom revealed through Christ, we preach the gospel of the kingdom through the gospel of Christ.  We now preach about the life and death of Jesus Christ.  Christ came and gave us a testimony, a first hand authentication of a fact.
2 Corinthians 4:5-6
For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake.
6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
We were given an insight into who God really is through the life and death of Jesus Christ.  "For God commanded the light to shine to give the light of the knowledge of the glory of God in the face of Jesus Christ"  God is love Paul is saying, and that is revealed through Christ.  

What is the kingdom of God?
Mark 1:14
14 Now after that John was put in prison, Jesus came into Galilee, preaching the gospel of the kingdom of God,
15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
Christ said, "the kingdom of God is at hand."  He was speaking about the representation of himself.  Repent and believe the gospel of the kingdom that I will present.  
Mark 10:14
14 But when Jesus saw it, he was much displeased, and said unto them, Suffer the little children to come unto me, and forbid them not: for of such is the kingdom of God.
Christ used many parables to explain to the world that the kingdom of God is love, pure, forgiving, longsuffering, gentle, meek, just and kind.  
Some believe that God is going to set up a physical kingdom on earth, before new Jerusalem, spoken of in Revelation 21:1-2
And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
2 And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband.
The kingdom of God was expressed, personified, revealed and was made manifest through Christ.  God is love was the message to the world by Christ and salvation is found in none other.  Seek Him and live.  The gospel of Christ, which is the gospel of the kingdom is a message of love calling the world back to Creator worship.  The gospel is God's story revealed through Jesus Christ about His kingdom.
Luke 10:9-11
9 And heal the sick that are therein, and say unto them, The kingdom of God is come nigh unto you.
10 But into whatsoever city ye enter, and they receive you not, go your ways out into the streets of the same, and say,
11 Even the very dust of your city, which cleaveth on us, we do wipe off against you: notwithstanding be ye sure of this, that the kingdom of God is come nigh unto you.
The kingdom came in the form of a message.  The Word was made flesh.  The message was embodied in Jesus Christ.  It was to explain to the world that God is the life of men.  Christ was pointing us to the Father and His kingdom.  Christ said He came to preach the gospel - Luke 4:18.  What gospel?  The answer is given in Matthew 24:14.  The gospel of the kingdom.

The gospel, a call to creator worship, a witness
Revelation 14:6-7
6 And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people,
7 Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.
What is the everlasting gospel?  It is a call back to Creator worship.  Seek me and live.  The Bible says, "Fear God and give glory to Him."  The everlasting gospel is an invitation to all people to seek God and worship Him who made the heaven and the earth.  Through the gospel, the character of God is vindicated as well.  God the Father stands justified at the cross.  The entire universe witnessed the death of our Lord and Savior by the hands of the devil.  They realized that sin causes death, pain and sorrow.  They realize the bitter consequences of sin, the dark ugly side of sin and that one day sin and all it's sorrow must be destroyed.  They realized that God is love and selfless because he took his only begotten and gave Him for a ransom price to save all people, most of whom did not love him.  While we were yet sinners Christ died.  The kingdom is love.