Amen & Amen

"Amen" AND "Amen" occurs 78 times in 72 verses in the KJV
Prophetic implications found in the double application of Amen. As insignificant as it may seem on the surface, it is by no means trite. The word Amen was used very carefully throughout the Old Testament to represent prophetic passages. The very word itself has a future tense. It means ‘so be it.’ Wherever you see the term Amen in the Old Testament, it has a prophetic implication. It is saying, ‘let the thing that is done or said, come to pass in the future.’
The Psalms are divided into five books which correspond with the five books of Moses. They, in turn, present an outline of future events. A Genesis period was predicted-for the land of Palestine to be prepared for the Chosen People. An Exodus period was predicted-when the Chosen People would return to their land. A Leviticus period was predicted-for a restoration of Temple worship. A Numbers period was predicted-for the world to suffer unparalleled tribulation. Finally, a Deuteronomy period was predicted-for the Messiah to establish the kingdom of heaven.
The first forty-one psalms correspond with the book of Genesis, the last verse of which is concluded with two Amens-declaring the Genesis section of the Psalms to be a prophecy.
Ps. 41:13 Blessed be the L-rd G-d of Israel from everlasting, and to everlasting. Amen, and Amen.
Psalms 42-72 corresponds to Exodus. Like the first book, it is also concluded with two Amens and is thus declared to be a prophecy.
Ps. 72:19 And blessed be his glorious name for ever: and let the whole earth be filled with His glory. Amen, and Amen.
Psalms 73-89 make up the third book, corresponding with Leviticus. Again the section is designated as prophecy. The psalmist declared, Amen, and Amen – ‘so be it, so be it.’
Ps. 89:52 Blessed be the L-rd for evermore. Amen, and Amen.
In each of these cases the two Amens seem to be saying, ‘What you have read is a prophecy. But read on, there is more!’ But the next Amen in Ps. 106:48 stands alone. It seems to be saying, ‘What you have read is a prophecy. But the story ends here, there is no more!’
Psalms 90-106 make up this fourth book of the Psalms, which compares with Numbers. It is a prophecy of those dreadful years at eh conclusion of this dispensation. It represents the time of G-d’s wrath. At the end of the Tribulation Period the Messiah will return to this earth to establish a new golden age-the millennial reign. Therefore, the Numbers section of the Palms concludes with a single Amen, followed by a Hallelujah.
Ps. 106:48 Blessed be the L-rd G-d of Israel from everlasting to everlasting; and let all the people say, Amen. Praise ye the L-rd Hallelujah.
Though the previous prophetic Psalms conclude with Amen and Amen, the Numbers section ends with a single Amen followed by Hallelujah. By this the psalmist declares the section to be not only prophetic, but the final prophecy containing the judgment of G-d. ‘So be it,’ he wrote, but then adds a Hallelujah, for the fifth book of the Psalms 107-150 declares not the judgment of G-d, but the blessings of the millennial kingdom.
When we cone to Psalm 150, which concludes all five books, we do not find the word Amen. Instead, we find the same word which followed the last Amen of the Numbers section. The last word of Psalm 150 declares, Hallelujah.
Now if all this seems insignificant, please understand that it is not. It is quite profound, pointing out the important events which will fulfill G-d’s great plan of the ages. Remember, the word Amen is prophetic, it means ‘so be it.’ In each place where it is found in the O.T., it declares that portion to be prophetic.
Taken from J.R.Church's book.