To me it represents the pineal gland. A gland located deep within the brain and thought by some to have a spiritual association - possibly the gland that produces internal DMT. Many believe that it can become calcified due to lack of use because supposedly it has a high affinity to calcium and flouride I believe. I've noticed that pine cones (which is what the pineal gland is said to look like) tend to be associated with many religions especially christianity. For instance, I heard that the pope carrie's a staff with a pinecone on it. Perhaps it is not a pinecone but a symbolic representation of the pineal gland? What are your thoughts on the symbol?