Have you ever seen Kutashta? - the circle with the star inside? Isn't Ariran the same Mysterious pass? Dear Kim Ki Duk, from all of yours movies I could NEVER clearly realize if you are aware of the existence of Kutashta or you just described it intuitively. Kutashta (Ariran) is more real than our so called "material" world. Through this mysterious pass which is very subtle and seems to be in other dimension life and death come and go. Spirit (male) and soul (female) reunite. Breath and Qi reunite. I believe that is the original symbolism in the Ariran song - the boy and the girl are separated as the mind and the spirit in the human being. They need to be reunited - that is the main goal of all valid sacred doctrines - DAO, Buddhism,Christianity, etc. When somebody is able to pass through this tiny canal he/she attain immortality (enlightenment, Buddhahood, apotheosis), which is the final goal of the human existence.