Flash and blood cannot enter the kingdom. Sinful flesh and blood definitely cannot enter. Transformed flesh and bone can enter.
Where did you read that? Certainly not in the Bible. It doesn't speak about any such transformed flesh and blood.
I really hope that you are not too disappointed when you find out that your life in heaven will be without a physical body of flesh and blood.
I got it out of scripture.
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Flesh and blood cannot inherit the kingdom of God,"comes from 1 Corinthians 15:50.
1 Corinthians 15:50
Now I say this, brethren, that flesh and blood cannot inherit the kingdom of God; nor does the perishable inherit the imperishable.
That verse comes from a larger narrative on the resurrection and the body raised. The narrative is not about the attributes of the kingdom (as was previously claimed in error).
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Sinful flesh and blood definitely cannot enter," comes from a host of verses such as John 3:3-5; 1 Cor. 6:9; Galatians 5:19-21 and Rev. 21:27
John 3:3-5
Jesus answered him, “Truly, truly, I say to you, unless one is born again, he cannot see the kingdom of God..... unless one is born of water and the Spirit, he cannot enter the kingdom of God.
1 Corinthians 6:9
Or do you not know that the unrighteous will not inherit the kingdom of God?
Galatians 5:19-21
Now the deeds of the flesh are evident, which are: immorality, impurity, sensuality........ and things like these, of which I forewarn you, just as I have forewarned you, that those who practice such things will not inherit the kingdom of God.
Revelation 21:27
...and nothing unclean, and no one who practices abomination and lying, shall ever come into it, but only those whose names are written in the Lamb's book of life.
"Transformed flesh and bone cane enter [God's kingdom]" comes from 1 Corinthians 15:35-54 and Philippians 3:2-21
1 Corinthians 15:35-53 (excerpted for the sake of space and clarity)
But someone will say, "How are the dead raised? And with what kind of body do they come?" You fool! That which you sow does not come to life unless it dies; and that which you sow, you do not sow the body, which is to be, but a bare grain, perhaps of wheat or of something else. But God gives it a body just as He wished, and to each of the seeds a body of its own. All flesh is not the same flesh, but there is one flesh of men, and another flesh of beasts, and another flesh of birds, and another of fish. There are also heavenly bodies and earthly bodies, but the glory of the heavenly is one, and the glory of the earthly is another. There is one glory of the sun, and another glory of the moon, and another glory of the stars; for star differs from star in glory. So also is the resurrection of the dead. It is sown a perishable body, it is raised an imperishable body; it is sown in dishonor, it is raised in glory; it is sown in weakness, it is raised in power; it is sown a natural body, it is raised a spiritual body. If there is a natural body, there is also a spiritual body............ As is the earthy, so also are those who are earthy; and as is the heavenly, so also are those who are heavenly. Just as we have borne the image of the earthy, we will also bear the image of the heavenly. Now I say this, brethren, that flesh and blood cannot inherit the kingdom of God; nor does the perishable inherit the imperishable.............. For this perishable must put on the imperishable, and this mortal must put on immortality.
Philippians 3:20-21
For our citizenship is in heaven, from which also we eagerly wait for a Savior, the Lord Jesus Christ; who will transform the body of our humble state into conformity with the body of his glory, by the exertion of the power that he has even to subject all things to himself.
Our bodies will be transformed so they conform to his body.
Luke 24:36-43
While they were telling these things, he himself stood in their midst and said to them, "Peace be to you." But they were startled and frightened and thought that they were seeing a spirit. And he said to them, "Why are you troubled, and why do doubts arise in your hearts? See my hands and my feet, that it is I myself; touch me and see, for a spirit does not have flesh and bones as you see that I have." And when he had said this, he showed them his hands and his feet. While they still could not believe it because of their joy and amazement, he said to them, "Have you anything here to eat?" They gave Him a piece of a broiled fish; and he took it and ate it before them.
He could appear and disappear, walk through walls, and eat solid food in his resurrected body of flesh and bone.
That is the body they saw ascend.
I really hope that you are not too disappointed when you find out that your life in heaven will be without a physical body of flesh and blood.
I hope you will not be disappointed to discover you have a body in heaven. Angels have bodies. At the transfiguration the disciples saw Moses and Elijah in physical form. Throughout John's vision he sees a multitude of people multiple times. When the kingdom comes to earth in the new city of peace it is not filled with disembodied non-bodies.
More importantly, our relative disappointment has nothing to do with whether or not sin spread to all men. That's an off-topic comment that has nothing to do with the discussion at hand. The relevant facts are the flesh is sinful and it is sinful because sin entered the world by one man's disobedience. Through that one man's one transgression there resulted condemnation to all men and through the one man’s disobedience the many were made sinners. It's in the flesh, not just a spiritual-only condition.