Stop Every Mouth
  What did Paul mean when he said, "Now we know that what things soever the law saith, it saith to them who are under the law: that every mouth may be stopped, and all the world may become guilty before God" (Romans 3: 19)? He had shown how Jew and Gentile were both in need of salvation because both had sinned. Those who lived subject to the Mosaic Law needed to realize the law was applicable to them and they were obligated to respect it.

  Once the law had spoken, that ended the matter. It was settled. Nothing more was allowed. Anything contrary to it was wrong. "Every mouth may be stopped" is the expression used to convey the idea that there is no use arguing against what God's law says because His law is the law and that is that. It really does not matter which law is under consideration, Moses' Law or the Law of Christ. We become guilty when we violate the law under which we live. God's law is authority and nobody else need say anything more. They should stop their mouths.