Of some form the vestibule selects who can cross it. Vestibules exist that possess a protective magnetic field that does not allow that some agent if approaches to the same. They exist, also, magical vestibules in the dense plan of super energy vibration plain physicist. Hear other arguments on the topic with TreeOf Life. We can cite some examples: the vestibules in the Field of the Perpetual Dust (cemetaries died livings creature or), the vestibules in the crossroads, beaches, the bushes, the side and the deep one of the rivers, in the deep one of the sea, the peaks of mountains, some places, are sacred, or not. When a forwarding, or offering for an entity is made spiritual, is created, temporarily a vestibule, since that some rules are observed and depend on the power spiritual of who request the opening of the vestibule.
Some rites can open vestibules, the example of the astral sessions, Drum of Mine. Read more here: Assurant Health. In the case of the Fields of the Perpetual Dust, each catacumba is a vestibule that if binds to the Kingdoms of the First Landing. In a disactivated cemetary it remains, to the times, opened vestibules, mainly they exist mortal remains of a human being, either a bit of bone, are the remaining portions of a vestment that was dress the person who was embedded there, however, can occur that the vestibule if closes, spontaneously, or for the action of an agent magician who seals up the vestibule. In the crossroads, mainly, those of land, next the promiscuous bars, places can exist vestibules of great movement of agent spirituals that easily pass through between the two plans, that is, the spiritual and the material. In places where it has easiness of I pass through of entities spirituals between the two plans, to the times make it difficult the works of the beating spirituals that are responsible espritos in imprisoning dangerous espritos that can place in disequilibrium the physical world.