The purifying mix of red heifer ashes and water, for example, serves to remind the worshiper of the two components of human being, (Dreams 1.209–212); for a discussion with references, see Sanders, Jewish Law from Jesus to the Mishnah, pp. 263–271. Sanders notes, “By biblical law, all Diaspora Jews were impure all of the time: everyone had to be assumed to have corpse-impurity, which could be removed only at the Temple. Childbirth-impurity also required sacrifices (Leviticus 12:6–8), as did leprosy and discharge…Nevertheless, Philo…thought that people who carried out a non-biblical domestic rite after corpse-impurity were really pure, in spite of not being allowed to enter the temple,” p. 270.