How do we know Christ is the King over all the earth?

In Zechariah 14:9, it is stated that 'the Lord shall be king over all the earth.' This assertion is based upon Christ's dual nature as both God and man, asserting His rightful authority due to His divine power and redemptive work. His reign signifies the culmination of God’s sovereign plan and the acknowledgment of His lordship by all creation. Believers are encouraged to recognize Him as King not just in theological terms but in practical daily living, as He governs their lives and hearts with wisdom and grace.