It is the method of manifesting, of bringing into complete manifestation, one purpose and plan.
AP 72, TT2
The term "ceremonial magic" is one which has been used deliberately, as both a veil and as an occult indication of Truth. It refers to the conscious manipulation of energy, force and substance which produces phenomenal appearance in the world of affairs.
Is that chronological use of natural law which brings order out of chaos. It is nothing more nor less than the practice of Divine Law and Order.
Some ceremony must be performed which invokes into manifestation the Will Aspect, which brings into matter the focused intent and therefore the outer appearance.