Well first of all a sinner must ENTER the Kingdom of God in order to SEE the Kingdom of God. It is similar to someone standing outside a museum. He would see absolutely nothing unless he first entered into the museum through the front door.
So the real question is how does a sinner enter into the Kingdom of God? And the answer is found in Scripture (Acts 2:34-41), and it is through repentance and faith in the one who is both Lord and Christ. And after sinners become saints by receiving the gift of the Holy Spirit, they can actually see the Kingdom of God:
34 For David is not ascended into the heavens: but he saith himself, The LORD said unto my Lord, Sit thou on my right hand,
35 Until I make thy foes thy footstool. [THIS IS THE KINGDOM OF GOD]
36 Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ.
37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
39 For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
40 And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.
41 Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
So the real question is how does a sinner enter into the Kingdom of God? And the answer is found in Scripture (Acts 2:34-41), and it is through repentance and faith in the one who is both Lord and Christ. And after sinners become saints by receiving the gift of the Holy Spirit, they can actually see the Kingdom of God:
34 For David is not ascended into the heavens: but he saith himself, The LORD said unto my Lord, Sit thou on my right hand,
35 Until I make thy foes thy footstool. [THIS IS THE KINGDOM OF GOD]
36 Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ.
37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
39 For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
40 And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.
41 Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
The same thing happened to Lydia Acts 16:14 “Now a certain woman named Lydia heard us. She was a seller of purple from the city of Thyatira, who worshiped God. The Lord opened her heart to heed the things spoken by Paul.”
And the Scripture tell us who causes us to be born again. I Peter 1:3 “Blessed be the God and Father of our Lord Jesus Christ! According to his great mercy, he has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead,”
Without being born again, you are not able to see the kingdom of God, how would you know to repent? Repentance is a kingdom pinciple.
John 6:63 “It is the Spirit who gives life; the flesh profits nothing. The words that I speak to you are spirit, and they are life….65 And He said, “Therefore I have said to you that no one can come to Me unless it has been granted to him by My Father.”
The Spirit gives life spiritual life because we are spiritually dead, the flesh is of no help and no one comes to Jesus in repentance unless the Father grants it.