The ninth letter of the Hebrew alphabet, it symbolizes the snake or serpent (nahash) in the Garden of Eden (Sex). Its Kabbalistic value is 9.
"The most elevated form of thinking is non-thinking. When one achieves the stillness and silence of the mind, the “I” with all its passions, dens, appetites, fears, affections, etc. becomes absent. It is only in the absence of the “I,” in the absence of the mind, that the Buddhata can awaken to unite with the Inner Self and take us to ecstasy."