# 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"