(Magick – Ceremonial) Are there such things? Are not all forces and beings part of a single and Divine Cosmos? Presumably, we have to say yes to that, but we also recognize that at different circumstances and times there are negative options. A snake bite can be poisonous. Even your pet cat can bite you and cause a severe, life-threatening infection.
In the context of magick, we are excluding from the Circle anything alien or unfriendly to the intent of the operation. Note the instructions in the GBG Curriculum that the magician is to pace three times around the Circle while holding the concentrated thought that the circle is encompassing all good magick forces and is excluding all distractions and whatever alien forces.
Circumscribing the Circle three times is traditional. Holding a “concentrated thought” is another way to state our “intention” to exclude unwanted influences. Important to this concept is to believe in the effect, and to have no fears or visions of frightful spirits or nasty forces trying to enter the Circle. In magick, as in any psychological practice, always keep the emphasis on the positive as already reality and avoid any thought of the negative while doing the operation.
This practice of exclusion also applies to thoughts and fantasies and day dreams that are common indulgences. Especially in group working, members not active at a given moment sometimes do "drift off" and that interferes with the purity of the magickal atmosphere inside the Circle.