There is confusion around the use of numbers in Revelation. In early alphabets and cultures, letters were also used as numbers, such as A=1, B=2, etc. Words could be assigned numerical values by adding up the individual letter values. Some numbers came to symbolize concepts - for example, 7 represents perfection. While numerology should not be overemphasized, some numbers like 40 and 7 appear frequently in the Bible and may have significance in Revelation.