Passage
Let the heathen be wakened, and come up to the valley of Jehoshaphat: for there will I sit to judge all the heathen round about.
Let the heathen be wakened, and come up to the valley of Jehoshaphat: for there will I sit to judge all the heathen round about.
Joel 3:10 Beat your plowshares into swords, and your pruninghooks into spears: let the weak say, I am strong.
Joel 3:11 Assemble yourselves, and come, all ye heathen, and gather yourselves together round about: thither cause thy mighty ones to come down, O LORD.
Joel 3:12 Let the heathen be wakened, and come up to the valley of Jehoshaphat: for there will I sit to judge all the heathen round about.
Joel 3:13 Put ye in the sickle, for the harvest is ripe: come, get you down; for the press is full, the fats overflow; for their wickedness is great.
Joel 3:14 Multitudes, multitudes in the valley of decision: for the day of the LORD is near in the valley of decision.
The verse centers on "heathen", "wakened", "come", "valley", "jehoshaphat", "judge", and "round". It is saying that the verse draws attention to "heathen" and "wakened", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 11's "Assemble yourselves and come all ye heathen..." into verse 13's "Put ye in the sickle for the...", so "heathen" and "wakened" 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 "heathen" and "wakened" with trust shaped by these words, not by a vague optimism outside the passage.