Final answer:
John borrows language from Joel to convey the concept of the 'day of the Lord' in the 5th and 6th trumpets. He uses biblical imagery and language to describe a time of divine judgment and intervention.
Step-by-step explanation:
In the passage provided, it appears that John is borrowing language from Joel for the concept of the 'day of the Lord' in the 5th and 6th trumpets. The phrase 'day of the Lord' is a biblical concept that refers to a time of divine judgment and intervention in human affairs. By using this phrase, John is drawing upon the language and imagery found in the book of Joel, which describes the day of the Lord as a day of darkness, destruction, and judgment.
For example, in Joel 2:2, it says, 'A day of darkness and gloom, a day of clouds and thick darkness.' Similarly, in Revelation 9:2-3, John describes the 5th trumpet as releasing 'smoke from the shaft of the bottomless pit' that darkens the sun and air. This language echoes the imagery of darkness and judgment found in Joel's description of the day of the Lord.
Overall, John borrows language from Joel to convey the idea of the 'day of the Lord' in the 5th and 6th trumpets, using biblical imagery and language to depict a time of divine judgment and intervention in his vision of the apocalypse.