Insufficient reasons... Since matters of religious symbolism typically attract self-styled esotericists who have a dislike for serious logical ratiocination, the usual explanations of the sacred status of the number 108 don't amount to much. Just as those people "explain" the status of the number 12 by merely enumerating "the 12 months, the 12 apostles" etc., they will merely enumerate a number of instances where the number 108 is in evidence.