In the Neolithic, walls defined newly protected spaces, creating an inner world prompted by the memory of caves, where there were no gates, and whose entrances were guarded by taboos.
As the brain is born with meme(ingful) updates, we recognize artifacts from a contemporary perspective, finding comfort in a community of patterns that are recognizable. It is difficult to think "out of the box," but not impossible. Various shamanic practices that make one question the nature of reality have been used at least since the Paleolithic, allowing one to see, as Lao Tzu said, the "Darkness within darkness, the gateway to all understanding."
Freud called this
gateway, "the holy dread." He wrote, "It is generally assumed
that taboo is older than the gods and goes back to the pre-religious age."
Adding that, "taboo throws light on the nature and origin of conscience...
collective conscience," such as a tribal culture would generate.
When I left the Zen temple in Cambridge, MA, I innocently took with me the short gray robe I had worn through many hours of meditation, in order to continue sitting as a member of the community in the world. Then I received a phone call ordering me to return it. I asked, “Can I buy it?” “No, you must return it. They were sown for us by devout women in Korea.” I could see them bent over their wonless work, mumbling old prayers.
The robe represented a connective thread to the group, the sangha, one that, rent apart, could not be mended, except, perhaps, in collective dreams.