4 “Thus says the LORD of hosts: ‘Old men and old women shall again sit In the streets of Jerusalem, Each one with his staff in his hand Because of great age. 5 The streets of the city Shall be full of boys and girls Playing in its streets.’ 6 “Thus says the LORD of hosts: ‘If it is marvelous in the eyes of the remnant of this people in these days, Will it also be marvelous in My eyes?’ Says the LORD of hosts. Zechariah 8:4-6
Hebrews 12:22 calls the Church "Jerusalem." A staff in the Bible was a tool of a shepherd used in his daily activities of shepherding sheep and goats as he'd offer them guidance out of danger, protect them from predators, and it would guide his own walk over rough terrain, assist his walk when he was weary, and save his life from thieves. Zechariah 8 indicates, however, that it would be children in New Jerusalem that are being offered guidance out of danger, protection from thieves and predators, and guidance through rough and wearying terrain.
The Lord of hosts is well pleased by this, and if it's the Lord of hosts that's the Chief Shepherd in this passage over the old men and old women, children, and animals that Zechariah 8:12 says shall be prosperous, when comparing Zechariah 8:12 with Jeremiah 31:27-28, then we are assured by these verses that the Lord's hosts, or angels, are standing guard in a Psalm 91 way over not only the old men, old women, children, and animals, but over the staff in the hands of the elders.
If it is marvelous, or miraculous, in His eyes, then the prosperity, freedom from fear, strengthening of hands, salvation, and blessing spoken of in Zechariah 8 are genuinely intense as we speak the truth, treat each other fairly, refuse to think evil of one another, keep our word, and do everything else Zechariah 8 says to walk out this promise of His into manifestation.
Zechariah 8:20-22 says people will come running from everywhere to get in on what God is doing among us in these days. The seed of His Word shall be prosperous in our lives and people will come to see it, pray before the Lord, and this is marvelous in His eyes!