4 And in that day his feet will be on the Mount of Olives, which is opposite Jerusalem on the east, and the Mount of Olives will be parted in the middle to the east and to the west, forming a very great valley; and half the mountain will be moved to the north and half of it to the south. 5 And the valley will be stopped ... and you will go in flight as you went in flight from the earth-shock in the days of Uzziah, king of Judah: and the Lord my God will come, and all his holy ones with him.
Matthew Henry's Commentary on Zechariah 14:4-5
Commentary on Zechariah 14:1-7
(Read Zechariah 14:1-7)
The Lord Jesus often stood upon the Mount of Olives when on earth. He ascended from thence to heaven, and then desolations and distresses came upon the Jewish nation. Such is the view taken of this figuratively; but many consider it as a notice of events yet unfulfilled, and that it relates to troubles of which we cannot now form a full idea. Every believer, being related to God as his God, may triumph in the expectation of Christ's coming in power, and speak of it with pleasure. During a long season, the state of the church would be deformed by sin; there would be a mixture of truth and error, of happiness and misery. Such is the experience of God's people, a mingled state of grace and corruption. But, when the season is at the worst, and most unpromising, the Lord will turn darkness into light; deliverance comes when God's people have done looking for it.