Jesus' royal lineage through David fulfills God's promise of an eternal kingdom through David's heir. Unlike previous kings, Jesus is the enduring King who reigns forever, fulfilling the unconditional "Davidic Covenant" by God's faithfulness alone. (References: Matthew 1:1-17, 1 Chronicles 17:11-14, 2 Chronicles 6:16, Matthew 19:28, Matthew 25:31)