Revelation 22:4

Blessed are the pure in heart, for they shall see God. (Mtt. Mat. 5:8)

And if I go and prepare a place for you, I will come again and receive you to Myself; that where I am, there you may be also. (John John 14:3)

Father, I desire that they also whom You gave Me may be with Me where I am, that they may behold My glory which You have given Me; for You loved Me before the foundation of the world. (John John 17:24)

For now we see in a mirror, dimly, but then face to face. Now I know in part, but then I shall know just as I also am known. (1Cor. 1Cor. 13:12)

Beloved, now we are children of God; and it has not yet been revealed what we shall be, but we know that when He is revealed, we shall be like Him, for we shall see Him as He is. And everyone who has this hope in Him purifies himself, just as He is pure. (1Jn. 1Jn. 3:2-3)

His name shall be on their foreheads.
Jesus told the church at Philadelphia that the overcomer would have three names written upon him: (1) the name of God; (2) the name of the New Jerusalem; and (3) Jesus’ new name (Rev. Rev. 3:12+). His name was written on the forehead of the 144,000 Jews of the Tribulation (Rev. Rev. 7:3+; Rev. 14:1+). In a similar way to which the Beast worshipers received the mark of the Beast as an indication of their identity with the Beast (Rev. Rev. 13:16+), the servants of God will be dedicated to Him. See commentary on Revelation 7:3 and Revelation 13:16. This name upon their foreheads recalls the dedication of the high priest who wore a plate of gold upon his headdress which was engraved: “HOLINESS TO THE LORD” (Ex. Ex. 28:36).