2-4 (Ephesians 1:13; 4:30). A Mark Which Angels Read—[Ephesians 1:13 quoted.] What is the seal of the living God, which is placed in the foreheads of His people? It is a mark which angels, but not human eyes, can read; for the destroying angel must see this mark of redemption (Letter 126, 1898).
(4BC 1161.4)
The angel with the writer′s ink horn is to place a mark upon the foreheads of all who are separated from sin and sinners, and the destroying angel follows this angel (Letter 12, 1886).
(4BC 1161.5)
(Revelation 7:2.) Seal Is a Settling Into Truth—Just as soon as the people of God are sealed in their foreheads—it is not any seal or mark that can be seen, but a settling into the truth, both intellectually and spiritually, so they cannot be moved—just as soon as God′s people are sealed and prepared for the shaking, it will come. Indeed, it has begun already; the judgments of God are now upon the land, to give us warning, that we may know what is coming (Manuscript 173, 1902).
(4BC 1161.6)