How do we know the gospel will reach all nations?

Scripture provides numerous assurances that the gospel will reach all nations. In Isaiah 66, God declares He will send a sign among the Gentiles, indicating His intention to include them in His salvation plan. This prophecy finds fulfillment in the New Testament, especially during Pentecost when the apostles preached, and people from various nations accepted the gospel. These accounts keep persistent with God's sovereignty and His ability to bring the unworthy into His presence, affirming that His word will not return void but will accomplish what He desires.