How do we know Christ is the promised seed in Abraham's covenant?

In Galatians 3:16, the apostle Paul explicitly identifies Christ as the promised seed to whom the covenant of blessing pertains. This seed brings redemption and justifies those who have faith, fulfilling God's promise that all nations would be blessed through Abraham's lineage. The significance of this promise is underscored in Hebrews 2:16, where Scripture asserts that Christ took on the seed of Abraham to accomplish God's redemptive plan, confirming that this promise extends beyond mere physical descendants to all who believe in Him.