According to Kabbalistic teaching, the left side of the body represents the "desire to receive" and is the entry point for all spiritual energy, both positive and negative. By wearing the string on the left wrist, users are said to intercept negativity at its point of entry.
Rachel is revered in Judaism as the ultimate symbol of motherly compassion and mercy. The book posits that by wearing a string that has been imbued with the energy of Rachel’s tomb, the wearer invites her protective spirit into their life. It connects the physical object to a lineage of spiritual energy that transcends time and place. EL LIBRO DEL HILO ROJO YEHUDA BERG..PDF