Question No. 21:
What is the seal of God upon the foreheads of the 144,000 (Rev. 7:3)? Is it the Sabbath seal or something else?
Being sealed in Christ “with that Holy Spirit of promise,” after having “heard the word of truth” (Eph. 1:13; 4:30), the saints are consequently sealed by Present Truth–the truth preached in their own day.
“The seal of the living God,” the Truth, by which the 144,000 are sealed (Rev. 7:2), is a special seal, being the same as “the mark” of Ezekiel 9. (See Testimonies to Ministers, p. 445; Testimonies, Vol. 3, p. 267; Testimonies, Vol. 5, p. 211). It demands one’s sighing and crying over the abominations which defile him and which desecrate both the Sabbath and the house of God, especially against selling literature and raising goals during Sabbath services. As the saints have this seal or mark on their foreheads, the angels will pass over them, not slay them. It is equivalent to the blood on the door post on the night of the Passover in Egypt. The angel is to place a mark upon the foreheads of all who by sighing over their own sins, and over the sins in the house of God, show fidelity to the Truth. Then the destroying angels will follow, to slay utterly both old and young who have failed to receive the seal. (See Testimonies, Vol. 5, p. 505.)
So, the former seal enables the receiver to rise from the dead in the resurrection of the just, while the latter seal enables the sighing-crying one to escape death and forever to live for God.