How do we know Christ is the fulfillment of the promises made to Abraham?

In Galatians 3:16, the apostle Paul specifically states that the promises to Abraham were made to 'his seed,' which is identified as Christ. This emphasizes that the covenant made with Abraham looks forward to the coming of Jesus, who is both fully God and fully man, and fulfills the role of the Messiah. Christ's lineage through Abraham, Isaac, and Jacob confirms that He is the promised seed, allowing all believers, Jew and Gentile alike, to partake in the blessings of salvation and grace.