Sealing in the Forehead

In preparation for the tribulation, John in Revelations says God will seal His people in their forehead as a protection against the calamities prophesied to come about before the Second Coming of Jesus Christ to the Earth.

Rev. 7: 3 Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God in their foreheads. What is this sealing that will occur before the tribulation?
Rev. 9: 4 And it was commanded them that they should not hurt the grass of the earth, neither any green thing, neither any tree; but only those men which have not the seal of God in their foreheads. This sealing seems to be a protection from the tribulation
Rev. 7: 9, 13-14 After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands; And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they? And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.

Those in white robes are the same who are sealed. notice they come out of the great tribulation.

Rev. 1: 6 And hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen.
Rev. 5: 9-10 And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation; And hast made us unto our God kings and priests: and we shall reign on the earth.

This same group that are sealed, dressing in a white robe, and come from every kindred, tongue and people, and nation are made kings and priests unto God.

Rev. 17: 14 These shall make war with the Lamb, and the Lamb shall overcome them: for he is Lord of lords, and King of kings: and they that are with him are called, and chosen, and faithful.

This same group are called, chosen and faithful

Heb. 5: 4 And no man taketh this honour unto himself, but he that is called of God, as was Aaron.

This honor is the priesthood. No man taketh it unto himself but needs to be called as was Aaron. How was Aaron called? He was called by prophecy and by the laying on of hands (1 Tim. 4: 14). But also, he was also washed and annointed, dressed in the undergarments and robes of the priesthood to serve in the temple.

Ezek 37:26-28 Moreover I will make a covenant of peace with them; it shall be an everlasting covenant with them: and I will place them, and multiply them, and will set my sanctuary in the midst of them for evermore. My tabernacle also shall be with them: yea, I will be their God, and they shall be my people. And the heathen shall know that I the Lord do sanctify Israel, when my sanctuary shall be in the midst of them for evermore.

Those that are prepared for the tibulation are sealed in their forehead, and dressed in a white robe, and called and chosen as was Aaron to serve in the temple day and night (Rev. 7: 15). When the sactuary (temple) is built in the Last Days. This temple will not be an Levitical or Aaronic Priesthood or Law of Moses Temple. There will be no blood sacrifice in modern Christian temples. This temple will be where the kings and priests of God will serve will administer the everlasting covenant of the Everlasting Melchesidek priesthood which involves admistering the infinite sacrifice of Christ, and the covenanting, consecration, and offering of our whole souls, a broken heart and a contrite spirit to God.

Heb. 7: 11 If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need was there that another priest should rise after the order of Melchisedec, and not be called after the order of Aaron?