“Now we know that whatever the Law says, it speaks to those who are under the Law, so that every mouth may be closed and all the world may become accountable to God” (Romans 3:19).
In the ancient law court, when a defendant completed the offering of his defense, he would cover his mouth to symbolically indicate there was nothing more to be said. In cases where a defendant spoke too long, or in a way that conflicted with the court, a judge or magistrate might order an officer of the court to strike the defendant in the mouth (See Acts 23:1-2). Whether it’s the general revelation of God within the created order and its corresponding moral law, or the specifics of the Mosaic law given to the Jews, Paul has already made it clear that humanity is without excuse (1:20). As such, the only sufficient words aren’t our alibis but, rather, a confession. In this we will find the path to redemption.