Revelation 18:2
And he cried mightily with a strong voice, saying, Babylon the great is fallen, is fallen, and is become the habitation of devils, and the hold of every foul spirit, and a cage of every unclean and hateful bird. (Revelation 18:2)
Cried mightily.
 In order that all might hear. The message of ch. 18 is to be proclaimed during the time of the loud cry of the third angel (GC 603, 604, 614, 615, 653), and thus merits the most careful study.
Babylon the great.
 See on chs. 14:8; 17:5.
Devils.
 Literally, “demons” (see on Mark 1:23). “Babylon the great” is now wholly demon possessed (see on Rev. 17:5, 6, 14. cf. on Matt. 12:43-45). Perhaps, in a special sense, reference is here made to modern spiritism (see on Rev. 13:13; Rev. 13:13, 14; cf. EW 273, 274; GC 558, 588, 624).
Foul spirit.
 Literally, “unclean spirit” (see on Mark 1:23).
Unclean and hateful bird.
 Metaphor is graphically added to metaphor to intensify the description of Babylon’s utter perversion and apostasy. In literary form ch. 18 reflects the structure of ancient Hebrew poetry (see Vol. III, p. 23).
Is fallen.
 See on ch. 14:8. Her spiritual fall is now to be demonstrated and confirmed, and she is now to be punished. Compare Isa. 13:21, 22; 21:9; Jer. 51:8.