Read Revelation 9.
In chapter 8, Jesus opened the seventh seal. Then John told us, “I saw the seven angels who stand before God, and seven trumpets were given to them” (v. 2) and “the seven angels who had the seven trumpets prepared to sound them” (v. 6). Four of those angels sounded their trumpets in Revelation 8; today we read about what happened when angels five and six sounded their trumpets.
What happened was painful torture to those not protected by God’s seal (vv. 4-12) and death for 33% of the world’s population (vv. 13-19).
One would expect that this kind of devastation would cause people to cry out to God for mercy. Instead, those who lived through these horrific events “still did not repent” of their false worship and disobedience to God. Their stubbornness demonstrates that sin nature is deeply planted in us all as are the sinful habits that we cultivate. Neither God’s judgment on others nor the threat of it can cause a person’s mind and heart to change. It is only God’s gracious working within any of us that changes our minds and causes us to turn to God in faith.
Thank God, though, that he does this gracious work in the hearts of many, including in our hearts when we came to believe in Jesus.
And this is one reason why we are here to give the gospel to others. Through the gospel message God works in hearts to open them to his gracious gift of salvation. Through that salvation, God delivers them from the coming days of his wrath like those described here in Revelation.
So keep looking for opportunities to share Christ with others. It is the only means of hope for humanity.