Answer: This is indeed a myth. There is no such thing in the wisdom of Kabbalah. There are no red strings, holy water, or blessings—nothing!
Kabbalists only study and explore the upper system in order to become part of it, to enter the spiritual world, as it is written, “May you see your world in your lifetime,” and teach this to others.
From the Israeli Radio Program 103FM 8/9/15