IS IT NECESSARY TO FULLY UNDERSTAND THE GOSPEL MESSAGE TO GET INTO THE KINGDOM OF GOD?

Only God knows the heart and He will judge through the one He has made Lord and Messiah as to who enters into the Kingdom of God.

Notice: Matthew 13:19: When any one hears the word about the kingdom, and understands it not, then comes the wicked one, and catches away that which was sown in his heart.

Now on to Luke 8:12: Those by the way side are they that hear; then comes the devil, and takes away the word out of their hearts, lest they should believe and be saved.

So Matthew 13:19: states that the word is about the kingdom [of God] and that makes clear what "word" is referred to in Luke 8:12; it is the word about the kingdom [of God] and one must understand that word about the coming Kingdom of God, the gospel of God that Jesus preached in order to be saved. Very, very important to know all about the good news message that Jesus preached all the time, even after his resurrection.

Notice: Acts 1:2 Until the day in which he was taken up, after that he through the holy spirit had given commandments unto the apostles whom he had chosen: To whom also he showed himself alive after his passion by many infallible proofs, being seen of them forty days, and speaking of the things pertaining to the kingdom of God:

Philip preached the same message that his lord preached about the coming kingdom of God and added to that message the name of Jesus:

Acts 8:12: But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus the Messiah, they were baptized, both men and women.

When you talk about the name of Jesus you are telling people everything there is to know from the scriptures about the Lord Jesus, that his shed blood ratifies the New Covenant, the he is the beginning of God's new creation, that his blood gives us forgiveness of our sins and and give us reconciliation to our God and Father Yehovah and so much more. This full gospel message Philip preached in order to prepare people for baptism. 

Paul preached the same message as his Lord and saviour Jesus.

Notice: Acts 20:24-25: But none of these things move me, neither count I my life dear unto myself, so that I might finish my course with joy, and the ministry, which I have received of the Lord Jesus, to testify the gospel of the grace of God. And now, behold, I know that you all, among whom I have gone preaching the kingdom of God, shall see my face no more.

Notice that verse 25 defines what the Gospel of the Grace of God is, it is the message about the coming kingdom of God. Interesting most preachers refer to verse 24 and do not go on to allow verse 25 define what the gospel of God Grace is?

Also note, that Paul preached exactly as did Philip to prepare people to be baptised: Acts 28:30-31: And Paul dwelt two whole years in his own hired house, and received all that came in unto him, preaching the kingdom of God, and teaching those things which concern the Lord Jesus the Messiah, with all confidence, no man forbidding him.

So we see that the complete good news message, the complete gospel message the the ministers and apostles taught was the message about the coming kingdom of God and the things which concern the lord Jesus the anointed one of God. 

That is the message people need to hear in order to be baptised and to be saved! Why is it not being preached to-day. When is the last time you head the complete gospel preached in your church? It was all Jesus talked about and the sermon on the Mount was given to those who desire to prepare for the positions they will have in the soon coming Kingdom of God, co-ruling and co-inheriting all things on this earth under the lordship of Jesus.
 

Jesus said the meek shall inherit this earth, so the reward of the saved is not in heaven but here on this earth! You don't go to heaven when you die, you go to the grave to await your resurrection at theLlord's Jesus return~!