en_tn_condensed/rev/15/02.md

sea of glass

Possible meanings are 1) a sea is spoken of as if it were glass. Alternate translation: "a sea that was as smooth as glass" or 2) glass if spoken of as if it were a sea.

who had been victorious over the beast and his image

"who had been victorious over the beast and his image by not worshiping them"

over the number representing his name

"over the number representing his name by not being marked with that number"