Commentaries:
Robertson's Word Pictures (NT)
As it were a glassy sea (wv qalassan ualinhn). Accusative case after eidon and wv here, not in Revelation 4:6, which see for the symbol.
Mingled with fire (memigmenhn puri). Perfect passive participle of mignumi, to mix, and the associative instrumental case puri. This item not in Revelation 4:6 (a vision of peace), but here it adds to the splendour of the vision. This parenthesis (Revelation 15:2-4) gives a picture of the martyrs in their state of bliss.
Them that come off victorious (touv nikwntav). Present active articular participle of nikaw, accusative after eidon, "those that come off victorious" (Revelation 14:4).
From the beast and from his image (ek tou qhriou kai ek thv eikonov autou). This use of ek after nikaw is unusual, also with ek tou ariqmou. For these items see Revelation 13:1, Revelation 13:14, Revelation 13:17; Revelation 14:9, Revelation 14:11; Revelation 19:20; Revelation 20:4.
By the glassy sea (epi thn qalassan thn ualinhn). Or "upon" more likely (Revelation 4:6) with the accusative as in Matthew 14:25 ff.
Harps of God (kiqarav tou qeou). Objective genitive, for the worship of God (Revelation 5:8; Revelation 14:2; I Chronicles 16:42).
Other Robertson's Word Pictures (NT) entries containing Revelation 15:2:
Revelation 2:7
Revelation 4:6
Revelation 7:1
Revelation 13:14
Revelation 15:2
Revelation 16:13
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