Interesting word(or letter) ....we can probably do an entire study on this single "mark"
The actual Hebrew word translated as mark in this verse is tav, the name of the Twenty-Second Letter. Everyone marked with the Tav Cross was protected when God poured out his wrath on the apostates corrupting His Temple. Similar imagery appears in Revelation 7 when God sealed 144,000 of His servants in their foreheads against the coming judgment. All of this conspires to reveal Tav as the Covenant Letter which is the meaning recognized by both Christians and Jews since antiquity. It is here that we come to an ultimate understanding of the overall structure of Scripture and an answer to the question: Why is the entire Bible built upon the Number 22? It is the Divine Seal of Scripture - a perfect Circle, sevenfold symmetric perfection, sealed with the Cross! Could anything be simpler? Could anything be more beautiful?
The ancient Rabbinical tradition calls Tav the Seal of God, the Seal of Truth, and the Seal of Creation. Rabbi Ginsburgh, in his article on Tav This link takes you off the Bible Wheel site and opens a new window, identifies the seal as truth (אמת, emet), spelt with the first, middle, and last of the sacred letters. He then says:
The last letter or seal of the word emet, "truth," itself - the seal of G-d's seal - is the letter tav, simple faith, the conclusion and culmination of all twenty-two forces - letters - active in Creation.
Could the truth shine forth more plainly? Could God have made it any simpler? For nearly two thousand years the truth of God has been lifted high upon the steeples of Christian churches throughout the world. It is the sign of the Cross!
Copyright © 2014 Richard Amiel McGough All Rights Reserved
That is just a little portion of biblewheel.com 2.0 (2009 - 2011)Which is an interesting read ............thought you might enjoy it.......I am no authority on Hebrew,far from it .......but I only know it to mean " mark" or truth given,completion,perfection-if I am correct With love-in Christ,Kwik