2 I saw something like a sea of glass mixed with fire, and those who overcame the beast, and his image, and the number of his name, standing on the sea of glass, having harps of God.
a sea of glass mixed with fire – those of the Sanctified Church, as having gone through plagues of Egypt, safely crossing on top of the Red Sea, delivered through baptism. The sea of glass and fire represents the baptism of water and the holy spirit: “I baptize you with water..He will baptize you with the holy spirit and fire” (Matt 3:11). Baptism is also compared to crossing the Red Sea by Paul in 1 Cor 10:1-2.
those victorious over the beast and his image – we are now beyond the LORD’s Day. The beast, the false Christ, and his image, the false God of the Trinity, have been defeated.
and the number of his name – victorious over the Latin man, Lateinos, 666, the corruption of the truth by “Latin Christianity.”
holding harps of God – a metaphor of praying in the Spirit, praying in tongues, as described in 1 Cor 14:7, and Rev 14:2.