Kabbalah su Proverbi 4:18

Then the three in charge, who have trowels in their hands, use them to fan the smoke and blow it back to its place. Then, they are at ease for an hour and a half, after which they return to the fire. They are also at ease three times a day, as well as each and every time Yisrael answer 'Amen, may the great name of Hashem be praised.' Happy are the righteous whose paths and ways illuminate and shine to all directions in the World to Come. As it is written: "But the path of just men is like the gleam of sunlight that shines ever more brightly until the height of noonday" (Mishlei 4:18). End of Tosefta

Thus, it is written, "And Abraham was old, advanced in age" (Beresheet 24:1), that is, in the shining lights (of benevolences). And he is old, as it is written, "that shines ever more brightly until the height of noonday" (Mishlei 4:18). Therefore, "And Elohim called the light Day." "And the darkness he called Night." This is Isaac, who is dark, and gets to receive the night within him. Therefore, when he grew older, it is written, "And it came to pass, that when Isaac was old, and his eyes were dim, so that he could not see" (Beresheet 27:1). (he had become completely dark). Assuredly he had to be (totally) dark to cleave well to his grade.

The path of the parting of the hair
A path shines in the center at the parting of the hairs that come out of the concealed brain, which is incomprehensible Chochmah. It is the path wherein the righteous shine in the world to come, as written, “But the path of just men is like the gleam of sunlight…” (Mishlei 4:18), wherefore it is written, “then shall you delight yourself in Hashem” (Yeshayahu 58:14). All other paths that derive from Zeir Anpin – the six hundred thirteen paths –are illuminated by this path.