The Red String is used for protection against the Evil Eye. The Evil Eye is a very powerful negative force. It refers to the unfriendly stares and unkind glances we sometimes get from people around us. Envious eyes and looks of ill will affect us, stopping us from realizing our full potential in every area of our life.
According to Kabbalah, the critical need to confront the problem of negative influences cannot be underestimated. People who fail to understand this and activate a protective shield through positive and proactive behavior can become victims.
Kabbalah teaches us that we can remove intrusive negative influences and, more importantly, that we have the potential to eradicate negativity forever. The power of the eye, when understood from a Kabbalistic perspective, becomes as powerful a healing instrument as it can be a devastating channel of destruction.