“Unto two thousand and three hundred days; then shall the sanctuary be cleansed.” Following the rules of interpretation used by standard commentators of the day, particularly the “day-year principle,” and accepting the contemporary view that in the Christian Age the earth is the sanctuary, Miller understood the cleansing to be the purification of the earth by fire at Christ’s Advent as it had been purified by water in the days of Noah. After diligent study, he became convinced that the 2,300-day