9. The three last seals relate to the invisible, as the first four to the visible world; the fifth, to the martyrs who have died as believers; the sixth, to those who have died, or who shall be found at Christ's coming, unbelievers, namely, "the kings . . . great men . . . bondman . . . freeman"; the seventh, to the silence in heaven. The scene changes from earth to heaven; so that interpretations which make these three last consecutive to the first four seals, are very doubtful.
      I saw--in spirit. For souls are not naturally visible.
      under the altar--As the blood of sacrificial victims slain on the altar was poured at the bottom of the altar, so the souls of those sacrificed for Christ's testimony are symbolically represented as under the altar, in heaven; for the life or animal soul is in the blood, and blood is often represented as crying for vengeance (Ge 4:10). The altar in heaven, antitypical to the altar of sacrifice, is Christ crucified. As it is the altar that sanctifies the gift, so it is Christ alone who makes our obedience, and even our sacrifice of life for the truth, acceptable to God. The sacrificial altar was not in the sanctuary, but outside; so Christ's literal sacrifice and the figurative sacrifice of the martyrs took place, not in the heavenly sanctuary, but outside, here on earth. The only altar in heaven is that antitypical to the temple altar of incense. The blood of the martyrs cries from the earth under Christ's cross, whereon they may be considered virtually to have been sacrificed; their souls cry from under the altar of incense, which is Christ in heaven, by whom alone the incense of praise is accepted before God. They are under Christ, in His immediate presence, shut up unto Him in joyful eager expectancy until He shall come to raise the sleeping dead. Compare the language of 2 Maccabees 7:36 as indicating Jewish opinion on the subject. Our brethren who have now suffered a short pain are dead under (Greek) God's covenant of everlasting life.
      testimony which they held--that is, which they bore, as committed to them to bear. Compare Re 12:17, "Have (same Greek as here) the testimony of Jesus."

JFB.