First, let’s figure out what “Amen” actually means. It is a Hebrew word that comes from “AMN.” This stands for stability and means ‘that’s how it will be’, ‘I agree’, ‘let it be that way’. Thus, when we say “amen” at the end of our prayers, we actually ask God to “let it be as we have prayed.”
Amen in the Old Testament
We see that the word “amen” occurs in both the Old and the New Testament. Many of the Old Testament references link the word “amen” to praise. The sentence “and all the people said, Amen, and praised God” in 1 Chronicles 16:36, is an example of the connection between the word “Amen” and praise. Double Amens (Amen and Amen) in the praise of God can be found in Psalm 41:13, 72:19, and 89:52. Here it looks like 1 person is praying or worshiping God and others are responding with “Amen.”
Amen in the New Testament
The New Testament writers also use the word “Amen.” Some do that at the end of their epistles. While others make the connection with worshiping and exalting God, and in reference to the Second Coming and the end of time (Revelation 22: 20,21). It is noticeable here that the person who describes the prayer or worship of God is the same person who also says “amen.” Thus, it tells God that we have prayed something that we really meant. Whether we pray with others or alone. It shows that we believe that God answers and answers our prayers as He sees fit.