“Behold, the day of the LORD comes, cruel, with wrath and fierce anger, to make the land a desolation and to destroy its sinners from it” (v9). Isaiah’s terrifying vision of God’s judgment on Babylon (v1) served as a warning to all rebellious peoples. “The day of the Lord” (v6) usually referred to Christ’s return, when “every human heart will melt” (v7) because God’s justice will be accomplished on earth. Isaiah warned his own generation and those to come to seek God’s mercy and grace before it was too late.
“The day of the Lord is near” (v6). When we trust in Jesus and pledge our lives to His reign, we can welcome His return without fear (I Thess 3:13).