7:3 sealed. The “seal of the living God” (Revelation 7:2) is, in one sense, the Holy Spirit (Ephesians 1:13; 4:30) and, no doubt, this sealing ministry of the Holy Spirit will be active in respect to all who will turn to Christ during the tribulation period, including the 144,000 Israelites. Nevertheless, this seal seems to be a special physical mark of some kind, perhaps the name of Christ (note Revelation 22:4), placed on their foreheads by another mighty angel (Revelation 7:2), possibly even Christ Himself. This will assure not only their eternal life but also the preservation of their physical lives through the terrible judgments yet to come. They were to serve as God’s special witnesses during the remaining years of the tribulation, especially to Israel, and possibly in the millennial age to follow. They must be especially prepared for this ministry, and therefore protected.