Words and letters provide a code that points to the spiritual object and to its unique situation. When one Kabbalist reads what another Kabbalist wrote, he can reconstruct the text and feel exactly what his fellow Kabbalist meant, just as a musician can reconstruct a musical piece that was written by a another composer 500 years ago through notes, or just as we mark the mathematical signs with notes that are numbers.
Courtesy of http://www.youtube.com/watch?v=JTz7rhommHI