For example putting on a special robe tells the body, the consciousness of Assiyah, that something sacred is about to happen. So much early work in the Mysteries is spent in the drudgery of repetition. Which is why real mages or trained occultists are much rarer than is supposed. Well, I've been in more than I can remember and from the viewpoint of Assiyah they are rather dull. However, from the viewpoint of the Upper Worlds they can be expressions of spiritual beauty beyond the power of words to convey.
Ceremony transcends the cerebral consciousness.
It provides a spring-board into the invisible by appealing to the senses with colour, music, incenses, ritual tableaus and sonorus chants. A typical group ritual consists of the members gathering at the appointed place. Together the members proceed into the 'temple'. Usually this is a rather bare room. There is little light and incense is burning.