What does the Bible say about Christ establishing His kingdom?

The establishment of Christ's kingdom is rooted in the prophecy of Isaiah 2:2, which states that 'the mountain of the Lord's house shall be established in the top of the mountains.' This signifies that Christ, through His first coming, established a kingdom that is exalted above all others. He did not merely provide a way to salvation; He accomplished it wholly by His action, providing a firm and secure foundation for His people. The last days began with His incarnation, and they continue until His return, affirming God's faithfulness throughout history. This fulfillment reflects God's sovereign grace as He gathers His elect from all nations to worship Him in spirit and truth.