However, if the individual does have a belief in God, the Order can start at that point and gradually develop in him a closer contact and communion with God and with all the divine principles and cosmic forces of nature. The Greek biographer Plutarch was an initiate of the Osirian mysteries. The mysteries of Isis were celebrated in secrecy in Rome. In ancient Egypt the Temples were not open to the public. Only priests had access to the inner halls, and one's level of initiation governed access to the most sacred places.
Initiation can be an emotionally impactful means of learning.
The Rosicrucians have developed a home study program which includes initiation ceremonies that the student performs at home. I have not participated in this program, and have no intention of doing so in the near future.