“LET ME HEAR YOU SAY, AMEN”
"For all the promises of God in Him are yea, and in Him Amen, unto the glory of God by us" (II Corinthians 1:20). 
The word "amen" is a most remarkable word. It was transliterated directly from the Hebrew into the Greek of the New Testament, then into Latin and into English and many other languages, so that it is practically a universal word. It has been called the best-known word in human speech. The word is directly related--in fact, almost identical--to the Hebrew word for "believe" (aman), or "faithful." Thus, it came to mean "sure" or truly," an expression of absolute trust and confidence. When one believes God, he indicates his faith by an "amen." When God makes a promise, the believer's response is "amen"--"so it will be!" In the New Testament, it is often translated "verily" or "truly." When we pray according to His Word and His will, we know God will answer, so we close with an "amen," and so also do we conclude a great hymn or anthem of praise and faith. 
The word is even a title of Christ Himself. The last of His letters to the seven churches begins with a remarkable salutation by the glorified Lord: "These things saith the Amen, the faithful and true witness, the beginning of the creation of God" (Revelation 3:14). We can be preeminently certain that His Word is always faithful and true, because He is none other than the Creator of all things, and thus He is our eternal "Amen." As our text reminds us, every promise of God in Christ is "yea and amen," as strong an affirmation of truth as can be expressed in the Greek language. 
It is, therefore, profoundly meaningful that the entire Bible closes with an "amen." "The grace of our Lord Jesus Christ be with you all. Amen" (Revelation 22:21), assuring everyone who reads these words that the whole Book is absolutely true and trustworthy. Amen! Words in the bible which contain “amen” in their spelling are AMEND, LAMENT, ORNAMENT, FIRMAMENT, and TESTAMENT.
The first "Amens" mentioned in the bible were in response to the giving of God's law before the Hebrews entered the promiseed land in Deuteronomy.

IN RESPONSE TO THE PREACHED WORDS OF GOD-
Nehemiah 8:6 And Ezra blessed the LORD, the great God. And all the people answered, Amen, Amen, with lifting up their hands: and they bowed their heads, and worshipped the LORD with their faces to the ground. 

WHILE REJOICING IN PRAISE AND WORSHIP TO GOD-
Psalms 41:13 Blessed be the LORD God of Israel from everlasting, and to everlasting. Amen, and Amen. 

Psalms 72:19 And blessed be his glorious name for ever: and let the whole earth be filled with his glory; Amen, and Amen. 

Psalms 89:52 Blessed be the LORD for evermore. Amen, and Amen. 

Psalms 106:48 Blessed be the LORD God of Israel from everlasting to everlasting: and let all the people say, Amen. Praise ye the LORD. 

BECAUSE HE'S RETURNING IN POWER TO WAKE THE DEAD FOR GOD-
Revelation 1:7   Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.
Revelation 22:20   He which testifieth these things saith, Surely I come quickly. Amen. Even so, come, Lord Jesus.
BECAUSE HE WAS RAISED TO 
AMEN TO HIS PRESENSE---Matthew 28:20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.
AMEN TO HIS EVIDENCE---Mark 16:20   And they went forth, and preached every where, the Lord working with them, and confirming the word with signs following. Amen.
AMEN TO HIS EDURING COMMITMENTS-- Luke 24:53   And were continually in the temple, praising and blessing God. Amen.  
Ephesians 3:21   Unto him be glory in the church by Christ Jesus throughout all ages, world without end. Amen.
AMEN TO THE POWER OF THIS SUBJECT MATTER---John 21:25   And there are also many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written. Amen.

AMEN TO HIS ALL-SUFFICIENTCY--- Romans 11:36   For of him, and through him, and to him, are all things: to whom be glory for ever. Amen.

AMEN TO HIS PROMISES---2 Corinthians 1:20   For all the promises of God in him are yea, and in him Amen

AMEN TO HIS LOVE AND COMMUNION---2 Corinthians 13:14   The grace of the Lord Jesus Christ, and the love of God, and the communion of the Holy Ghost, be with you all. Amen.

AMEN TO ALL WHO ARE SINCERE IN WHAT THEY DO---Ephesians 6:24   Grace be with all them that love our Lord Jesus Christ in sincerity. Amen.

AMEN TO THE ALL-DESERVING ONE--- 1 Timothy 1:17   Now unto the King eternal, immortal, invisible, the only wise God, be honour and glory for ever and ever. Amen. 

  1 Timothy 6:16   Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen.
AMEN IS THE UNIVERSAL WORD OF HEAVEN---Revelation 19:4   And the four and twenty elders and the four beasts fell down and worshipped God that sat on the throne, saying, Amen; Alleluia.
AMEN TO LIVING A CLEAN LIFE IN YOUR YOUTH---1 John 5:21   Little children, keep yourselves from idols. Amen

AMEN IS THE LAST WORD IN THE BIBLE!!!