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I really liked his discussion in here on how the lion in the Bible represents the ego/ lower nature/ self image.
The Maasai tribe had a tradition that for men to prove their manhood and become a warrior, they had to kill a lion. Girls were forced to be circumcised to become a woman. Were these physical acts both symbolic acts of losing their lower nature? Was that how these traditions started?
Modern society doesn't allow these acts to continue. Lions live and girls are not harmed.
Once we reshape cultures, not only do we lose traditions, but we lose the real meaning behind the practices. We can reshape traditions before they disappear, but once the knowledge behind the traditions is lost, it takes great effort to retrieve the information and restart old ways (even if we start them in a more modern way). Example: I don't agree with circumcision (boy and girl), but I do agree with the meaning behind it... and perhaps there is a less harmful way of performing the same ritual. When you drop the practice altogether, you also lose the significance of why that practice was created.