How do we know the Gospel's proclamation is for all sinners?

The proclamation of the Gospel goes forth universally, as emphasized in Mark 16:15 and throughout the New Testament. It extends an invitation for all who hear it, regardless of their sins, to come to Christ and receive His mercy. This does not imply that all will be saved, but that the offer is genuinely made to all who will believe. The declaration that Christ is the Savior of sinners, including the vilest of them, showcases the breadth of God's grace. In Acts 10:43, it is affirmed that everyone who believes in Him receives forgiveness of sins, indicating the inclusive nature of the Gospel call.