9 Bible Verses about Angels Activities Among Unbelievers

Then I saw another angel flying in mid-heaven with an eternal gospel for the inhabitants of the earth, for every nation and tribe and tongue and people; he cried aloud, "Fear God and give him glory, for the hour of his judgment has come; worship him who made heaven and earth, the sea and the fountains of water." And another, a second angel followed, crying, "Fallen, fallen is Babylon the great, who made all nations drink the wine of the passion of her vice!"read more.
They were followed by another, a third angel, crying aloud, "Whoever worships the Beast and his statue, and lets his forehead or hand be marked, he shall drink the wine of God's passion, poured out untempered in the cup of his anger, and shall be tortured with fire and brimstone before the holy angels and before the Lamb:

the Son of man will despatch his angels, and they will gather out of his Realm all who are hindrances and who practise iniquity, and throw them into the furnace of fire; there men will wail and gnash their teeth.

and in a moment an angel of the Lord struck him, because he had not given due glory to God; he was eaten up by worms and so expired.

For last night an angel of the God I belong to and serve, stood before me, saying, 'Have no fear, Paul; you must stand before Caesar. And God has granted you the lives of all your fellow-voyagers.'

After that I saw four angels standing at the four corners of the earth, holding back the four winds from blowing on the earth or on the sea or on any tree. And I saw another angel rise up from the east, with the seal of the living God; he shouted aloud to the four angels who were allowed to injure the earth and sea,

So the four angels were unloosed, who had been kept ready for that hour and day and month and year, to kill the third of men.

Then I saw another portent in heaven, great and marvellous: seven angels with seven plagues ??the last plagues, for they complete the wrath of God.

but an angel of the Lord said to Philip, "Get up and go south, along the road from Jerusalem to Gaza" (the desert-route). So he got up and went on his way. Now there was an Ethiopian eunuch, a high official of Candace the queen of the Ethiopians (he was her chief treasurer), who had come to Jerusalem for worship and was on his way home. He was sitting in his chariot, reading the prophet Isaiah.read more.
The Spirit said to Philip, "Go up and join that chariot." When Philip ran up, he heard him reading the prophet Isaiah. "Do you really understand what you are reading?" he asked. "Why, how can I possibly understand it," said the eunuch, "unless some one puts me on the right track?" And he begged Philip to get up and sit beside him. Now the passage of scripture which he was reading was as follows: ??he was led like a sheep to be slaughtered, and as a lamb is dumb before the shearer, so he opens not his lips. By humbling himself he had his doom removed. Who can tell his family? For his life is cut off from the earth. So the eunuch said to Philip, "Pray, who is the prophet speaking about? Is it himself or someone else?" Then Philip opened his lips, and starting from this scripture preached the gospel of Jesus to him. As they travelled on, they came to some water, and the eunuch said, "Here is water! What is to prevent me being baptized?" -- So he ordered the chariot to stop. Both of them stepped into the water, and Philip baptized the eunuch. When they came up from the water, the Spirit of the Lord caught Philip away, and the eunuch lost sight of him. He went on his way rejoicing,

So, I tell you, there will be joy in heaven over a single sinner who repents, more than over ninety-nine good people who do not need to repent.