This means that God freely, without good works, forgives and accepts any repentant sinner who puts his faith in Christ Jesus.
Every mouth is stopped.
But God does not leave us without hope and in total despair. Rather, God brings ALL the world into condemnation that He may have mercy on ALL who put their faith in the doing and dying of Jesus Christ, the Jew first and also the Gentile. NO ONE is left out. And we know that all things work together for good to them that love God, to them who are the called according to His purpose. For whom He did foreknow, he also did predestinate to be conformed to the image of His Son, that He might be the firstborn among many brethren.