How should I use the circle of protection?

...the disciples who want to defend themselves against the attacks of black magic must habituate themselves to mentally trace the magical circle. The magical circle can be performed before falling into normal sleep or whenever it is necessary. - Samael Aun Weor

When you trace a magical circle around yourself, whether it is with your sword, with your willpower and imagination united in vibrating harmony, or with both at the same time, you must pronounce the following mantras:

Helion, Melion, Tetragrammaton

The magician defends himself against attacks from the demons with the magical circle and the esoteric pentagram.