Revelation 22:4

And they shall see his face
The face of God, so as he is not to be seen now; they shall see him as he is; not only the angels, who always behold the face of God, but all the saints, risen and changed, being pure in heart, and perfectly holy; they shall see him face to face, they shall have intimate and familiar communion with him; they shall enjoy his favour, and have the freest and largest discoveries of his love; and they shall see the face of the Lamb; they shall behold Christ and his glory both with the eyes of their understanding, and with the eyes of their bodies; and this is a very desirable sight, and will be very glorious and delightful; it will be fully satisfying, and will make the saints like unto him; it will be free from all darkness and any interruption, and will always continue.

And his name shall be in their foreheads;
they shall be known to be his servants, as if his name was written and bore on their foreheads; it will be a clear case that they are the children and people of God; now they are, but it is not known, at least not so known as it will be in this state; and they will also in the fullest and freest manner own God to be their God, and the Lamb to be their Redeemer; they will be under no fear of man, nor be under any temptation to be ashamed of Christ, or of his service; see ( Revelation 14:1 ) . Some think there is an allusion to the inscription on the mitre of the high priest's forehead, "holiness to the Lord", the saints being now openly, visibly, and perfectly holy.