Zerubbabel had a big task ahead of him to rebuild the Jerusalem temple, but this great mountain would become as a plain. This rebuilding would not be accomplished in Zerubbabel’s strength or ability but through utter dependence upon God.
Not by might, nor by power, but by My Spirit, says the Lord, as He gives you a steady supply of fresh oil to produce ample light. Be faithful in what your hands find to do and leave the results to God.
Zechariah 4:7 (NKJV) Who are you, O great mountain? Before Zerubbabel you shall become a plain! And he shall bring forth the capstone with shouts of "Grace, grace to it!"