What does the Bible say about building God's kingdom?

Building God's kingdom is fundamentally an act of God, as depicted in Zechariah 4. The people returned from Babylonian captivity to rebuild the temple, illustrating that with every effort to build the kingdom, it's ultimately reliant on God's sovereign purpose. The imagery of the golden candlestick in Zechariah symbolizes God's enduring presence and the necessity of His divine light in the process of rebuilding. It shows that, while God uses His people as instruments, it is He who completes the work through His Spirit and grace.