It would appear many brethren in Christ have great trouble understanding the idea of allegory in God's Word. Some areas in God's Word tells you specifically an allegory is being given. Most other Scripture examples don't and instead rely on us to get into God's Word more in order to understand.
An allegory is simply a story or description of one thing that's used to reveal a separate meaning, often a hidden meaning. Here's an example by Apostle Paul...
Gal 4:22-31
22 For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
23 But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
24 Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.
25 For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.
26 But Jerusalem which is above is free, which is the mother of us all.
27 For it is written, 'Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she which hath an husband.'
28 Now we, brethren, as Isaac was, are the children of promise.
29 But as then he that was born after the flesh persecuted him that was born after the Spirit, even so it is now.
30 Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman.
31 So then, brethren, we are not children of the bondwoman, but of the free.
KJV
Those in Christ Jesus are represented by the promise to the son of the free woman (Isaac), which is about the future new Jerusalem, the Heavenly Jerusalem that's free. The bondwoman (Ishmael) is represented by those of earthly Jerusalem which is in bondage (until Jesus returns).
Paul says these two sons represent the two covenants. Yet we well know the covenants aren't sons literally, but only the two sons of Abraham being used to represent them. Easy peazey. It's an allegory. Paul even points to another allegory given in Isaiah 54 about the barren woman having more children than the married wife. But there's nothing written there to 'tell' you it's an allegory. But there is here in Galatians 4:24. We have to grasp how Isaiah 54 is an allegory through Bible study.
But what about this being changed, is this an allegory?
1 Cor 15:51-53
51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
53 For this corruptible must put on incorruption, and this mortal must put on immortality.
KJV
No, that being changed there is not... an allegory. It will happen literally, just as Apostle Paul wrote it. Even though we may find some things written in God's Word difficult to understand, especially compared to the things of our present world, that doesn't mean to disregard it as allegory like it's just pointing to some hidden spiritual concept.
This is where many brethren are confused, often assigning literal Scripture in God's Word as being meant in the spiritual sense, and then other allegorical type Scripture as being literal. They get the meaning backwards. Satan's host uses that confusion against the Biblical illiterate, doing some of their best work in some pulpits.
An allegory is simply a story or description of one thing that's used to reveal a separate meaning, often a hidden meaning. Here's an example by Apostle Paul...
Gal 4:22-31
22 For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
23 But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
24 Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.
25 For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.
26 But Jerusalem which is above is free, which is the mother of us all.
27 For it is written, 'Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she which hath an husband.'
28 Now we, brethren, as Isaac was, are the children of promise.
29 But as then he that was born after the flesh persecuted him that was born after the Spirit, even so it is now.
30 Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman.
31 So then, brethren, we are not children of the bondwoman, but of the free.
KJV
Those in Christ Jesus are represented by the promise to the son of the free woman (Isaac), which is about the future new Jerusalem, the Heavenly Jerusalem that's free. The bondwoman (Ishmael) is represented by those of earthly Jerusalem which is in bondage (until Jesus returns).
Paul says these two sons represent the two covenants. Yet we well know the covenants aren't sons literally, but only the two sons of Abraham being used to represent them. Easy peazey. It's an allegory. Paul even points to another allegory given in Isaiah 54 about the barren woman having more children than the married wife. But there's nothing written there to 'tell' you it's an allegory. But there is here in Galatians 4:24. We have to grasp how Isaiah 54 is an allegory through Bible study.
But what about this being changed, is this an allegory?
1 Cor 15:51-53
51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
53 For this corruptible must put on incorruption, and this mortal must put on immortality.
KJV
No, that being changed there is not... an allegory. It will happen literally, just as Apostle Paul wrote it. Even though we may find some things written in God's Word difficult to understand, especially compared to the things of our present world, that doesn't mean to disregard it as allegory like it's just pointing to some hidden spiritual concept.
This is where many brethren are confused, often assigning literal Scripture in God's Word as being meant in the spiritual sense, and then other allegorical type Scripture as being literal. They get the meaning backwards. Satan's host uses that confusion against the Biblical illiterate, doing some of their best work in some pulpits.