Lamed begins the Hebrew words for both "learn" and "teach," and so encompasses the most Kabbalist of activities, study. Kabbalah has never been a path of pure sensation, but always has used study to goad us into higher consciousness.
The significance of the Hebrew root "lamed" lies in its association with both "study" and "teach," thereby encompassing the fundamental activities of Kabbalah. This highlights the intellectual nature of Kabbalah, which seeks to cultivate higher consciousness through diligent study and spiritual exploration.