In the Old Testament book of Zechariah, God speaks through His prophet to His people letting them know that the accomplishing of His plans and purposes will not be due to a bunch of strong men working together, nor will it be due to the efforts of one great and strong man…it will only be due to the effort of the Holy Spirit.
There's no human agency at all…no human strength or human power of every description…physical, mental, moral…combined or individual…will never bring about the salvation of the nation Israel, nor will it bring about the salvation of the nations. When it's done, no one will be able to take the credit for it; for this was the work of God.
This is how God wants to use the Christian. It’s not our brains; it’s not our brawn; it’s not our bankroll; it’s not even our behavior, it’s by His Spirit. This is how God wants to use the church as a light to their community and beyond. This is why it says in Zechariah 4:6, “Not by might, nor by power, but by my Spirit saith the Lord.”