Shen

Perfection shen rings , devoid of beginning and end, made this amulet a symbol of eternity, its round shape associated it with the disk of the Sun: in paintings, it often appeared supported by animals or birds, such as a hawk, with strong heliac connotations.
Magic rings were very revered, which attributed to them the power of protection from disease, since each circle represents the protection of his ego from external influences, so the magician locked himself inside a magic circle surrounded by symbols and names of "powers", which were nothing but the physical forms of parts of the unconscious a magician who will have to fight against himself in order to get the release of energies that will take shape and character depending on the type of ritual performed.
Rituals always need external protection, at least until the magician learns to build his circle in his aura, after which he no longer needs certain objects to protect himself from external aggression or pseudo-attacks. The shen ring is a braided rope with round knots. Its meanings are extremely complex, but perhaps the most common is the one that represents it as a ring of power.