Revelation 7:1-3 (ESV)
1 After this I saw four angels standing at the four corners of the earth, holding back the four winds of the earth, that no wind might blow on earth or sea or against any tree. 2 Then I saw another angel ascending from the rising of the sun, with the seal of the living God, and he called with a loud voice to the four angels who had been given power to harm earth and sea, 3 saying, “Do not harm the earth or the sea or the trees, until we have sealed the servants of our God on their foreheads.”
John looks and sees four angels holding back the four winds. Remember, this is a vision, and there is much symbolism. When the Bible talks about the winds blowing here, it is referring to the coming judgment, the wrath of God. The angels are not to let that wrath be poured out on the earth until a fifth angel places the seal of God on his servants.
What is the point of the seal? An official seal might do many things. In this instance, the seal marks ownership. It says that those who bear this seal belong to God and may not be harmed by the outpouring of his wrath. It parallels something we see in the Old Testament, in Ezekiel 9:1-7. There God had plans to destroy Jerusalem for the sin of the people. However, God would not pour out his anger on those who were his, those who bemoaned the sin of the people. So God sent out someone to place his mark on the foreheads of his people in order to protect or preserve them from the wrath to come.
The same concept is in view in Revelation 7, and it should give you great encouragement. God will not pour out his anger, his fury, his wrath on his people. No, if someone belongs to God, they will bear his seal. If someone belongs to God, they will be protected by God from the fury that he will unleash on the lost world. Praise God for preserving his people. If you are one of God’s people, rejoice that God protects you from his fury. If you have not given your life to Jesus, do so to be under his protection before it is too late.