Amen! Or did they? It is increasingly rare to hear a vigorous ‘amen’ at the conclusion of a corporate prayer and it has become almost non-existent to hear the congregational choir end the corporate praises of God with an ‘amen’ either sung or spoken.
Here is a good reminder from R. C. Sproul on the use of the Amen in worship.
The term amen was used in the corporate worship of ancient Israel in two distinct ways. It served first as a response to praise given to God and second as a response to prayer. Those same usages of the term are still in vogue among Christians. The term itself is rooted in a Semitic word that means “truth,” and the utterance of “amen” is an acknowledgment that the word that has been heard, whether a word of praise, a word of prayer, or a sermonic exhortation, is valid, that is, sure and binding. Even in antiquity, the word amen was used in order to express a pledge to fulfill the terms of a vow. So, this little word is one that is centered on the idea of the truth of God.
The truth of God is such a remarkable element of Christian faith that it cannot be overlooked. There are those who think that truth is negotiable or, even worse, divisive, and it therefore should not be a matter of passionate concern among believers. But if we are not concerned about truth, then we have no reason to have Bibles in our homes. The Bible is God’s Word, and God’s Word is true. It is not just true but is truth itself. This is the assessment made of it by the Lord Jesus Christ Himself (John 17:17).
Therefore, when we sing a hymn that reflects biblical truth and end it with the sung word amen, we are giving our approbation of the content of the praise in the hymn. When we have a choral “amen” at the end of the pastoral prayer, again we are emphasizing our agreement with the validity and surety of the content of the prayer itself.
Worship in biblical terms is a corporate matter. The corporate body is made up of individuals, and when an individual sounds the “amen,” the individual is connecting to the corporate expression of worship and praise. However, we are told in the Scriptures that the truths of God are “yea” and “amen” (2 Cor. 1:20), which simply means that the Word of God is valid, it is certain, and it is binding. Therefore, the expression “amen” is not simply an acknowledgment of personal agreement with what has been stated; it is an expression of willingness to submit to the implications of that word, to indeed be bound by it, as if the Word of God would put ropes around us not to strangle or retard us but to hold us firmly in place.