2. A temporary boundary within which a séance or magical operation may take place. The theory is that is becomes a kind of psychic container for the energies used in the operation and a barrier to unwanted energies from outside.
The Magick Circle—whether drawn physically or in the imagination—is the "container" of magickal operations. The "Opening" and the "Closing" of the Temple—or of the Circle—is an operation that is both magickal and psychological. The rituals of Opening and Closing are various but all are simple projections of energy guided by will power with the express intent to provide a barrier against exterior forces while establishing the Circle (or Lodge) as container of the magickal energies
AUTHOR: Carl Llewellyn Weschcke