And it shall come to pass in that day, that the mountains shall drop down sweetness, and the hills shall flow with milk: and waters shall flow through all the rivers of Juda: and a fountain shall come forth of the house of the Lord, and shall water the torrent of thorns.
Joel 3:16 And the Lord shall roar out of Sion, and utter his voice from Jerusalem: and the heavens and the earth shall be moved, and the Lord shall be the hope of his people, and the strength of the children of Israel.
Joel 3:17 And you shall know that I am the Lord your God, dwelling in Sion, my holy mountain: and Jerusalem shall be holy, and strangers shall pass through it no more.
Joel 3:18 And it shall come to pass in that day, that the mountains shall drop down sweetness, and the hills shall flow with milk: and waters shall flow through all the rivers of Juda: and a fountain shall come forth of the house of the Lord, and shall water the torrent of thorns.
Joel 3:19 Egypt shall be a desolation, and Edom a wilderness destroyed: because they have done unjustly against the children of Juda, and have shed innocent blood in their land.
Joel 3:20 And Judea shall be inhabited for ever, and Jerusalem to generation and generation.
The verse centers on "shall", "come", "pass", "mountains", "drop", "down", and "sweetness". It is saying that the verse draws attention to "shall" and "come", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 17's "And you shall know that I am..." into verse 19's "Egypt shall be a desolation and Edom...", so "shall" and "come" belong inside that flow. In Joel context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "shall" and "come" with trust shaped by these words, not by a vague optimism outside the passage.