They shall see his face: “they will see God face to face.” What has always been impossible (see Exo 33.20; 1 Tim 6.16) will then be possible (see Matt 5.8; 1 John 3.2).
His name shall be on their foreheads: that is, the name of God (see 14.1).
Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on The Revelation to John. (UBS Handbook Series). New York: UBS, 1993. For this and other handbooks for translators see here .