1 Corinthians 14:16-17
If you are praising God with your spirit, how can one who finds himself among those who do not understand say “Amen” to your thanksgiving, since he does not know what you are saying? You may be giving thanks well enough, but the other man is not edified.
As Paul writes to the Corinthians, he is addressing the issue of speaking in tongues and the way that they had misused the gift. His advice is applicable to all Christians about how we should conduct our thanksgiving however.
Our thanksgiving should edify other believers. There are times when we give thanks in private but when we do so publicly it should be of benefit to those around us.
When we thank God in public, other people should be reminded that things that we give thanks for are gifts from God. If they have received similar gifts, they should be prompted to thank God for them as well.
When there is agreement in thanksgiving, a great thing happens – offers of thanks spread. It can start like a small spark inside of a church. One person gives thanks and then another realizes that they have the same thing to be thankful for. Soon the entire church can be praising God for the same thing and the whole church is edified in their thanks.