How do we know that Jesus is the root and offspring of David?

The phrase 'root and offspring of David' in Revelation 22:16 illustrates the dual nature of Christ. As the root, He is recognized as David's Lord and creator, showing His divine preexistence. In contrast, as the offspring, He fulfills the promise made to David that the Messiah would come from his lineage. This duality affirms both the divinity and humanity of Christ, assuring believers that their Savior holds the authority and lineage promised in Scripture. This profound declaration encapsulates the essence of Christ's role in relation to God's covenant with His people.