A.T. Robertson Commentary Revelation 15:4

"Who shall not fear, O Lord, and glorify thy name? for thou only art holy; for all the nations shall come and worship before thee; for thy righteous acts have been made manifest." — Revelation 15:4 (ASV)

Who shall not fear? (τις ου μη φοβηθηι; ). Rhetorical question with ου μη (double negative) and first aorist passive subjunctive of φοβεομα future passive in Jer 10:7).

And glorify (κα δοξασε). Change here to the future indicative instead of the aorist subjunctive, as often. Cf. Psalms 86:9.

Thou only art holy (μονος οσιος). Both predicate adjectives, "Thou art alone holy." God alone is perfectly holy (16:5).

Shall come (ηξουσιν). Future active of ηκω.

And worship (κα προσκυνησουσιν). Future active of προσκυνεω. Both from Ps 86:9.

Have been made manifest (εφανερωθησαν). Prophetic first aorist passive indicative of φανεροω. This martyr's song has the ring of great poetry.