What does Zechariah 4:6 teach about God's strength?

In Zechariah 4:6, the Lord assures Zerubbabel that the rebuilding of the temple will not be accomplished by might or power, but by His Spirit. This teaching underscores the sovereign grace of God in the work of salvation and spiritual building. Just as Zerubbabel was chosen to lead the restoration of the temple, believers today are reminded that our spiritual growth and the building of the church are entirely dependent on divine strength, not human effort. This principle reflects the Reformed understanding that all aspects of salvation, from regeneration to sanctification, are ultimately the work of the Holy Spirit.