Rabbi Shimon says that the path that shines in the division of the hairs that come out of the hidden brain is the path of the righteous. He talks about the supernal Keter above that is a hidden and entirely unknown higher candle.
40. One path shines in THE MIDDLE OF the division of the hairs that come out of the CONCEALED brain, WHICH IS CONCEALED CHOCHMAH. It is the path where the righteous shine in the World to Come, as it is written, "But the path of just men is like the gleam of sunlight" (Mishlei 4:18), "then shall you delight yourself in Hashem..." (Yeshayah 58:14). From this path shine all other paths that derive from Zeir Anpin, WHICH ARE 613 PATHS.
41. This Atika, WHICH IS ARICH ANPIN, the oldest among the old, FROM WHICH DERIVE SUPERNAL ABA AND IMA THAT ARE CONSIDERED OLD, is the supernal Keter above, NAMELY KETER OF ARICH ANPIN, with which all crowns are decorated, NAMELY ALL MOCHIN. FOR MOCHIN ARE CONSIDERED CROWNS, WHICH ARE THE SEVEN CHARACTERISTICS OF THE HEAD THAT SHALL BE EXPLAINED AND THE THIRTEEN CHARACTERISTICS OF THE BEARD. And the crowns shine FROM IT, WHICH ARE ABA AND IMA, and the other candles, NAMELY SEVEN LOWER SFIROT, WHICH CONTAIN JUDGMENTS, glow from it and shine. NEVERTHELESS, it ITSELF is a hidden supernal unknown candle.