Atika Kadish also named as ‘Atik Yomin’ is the supernal ‘face’ of the sefirah of Keter. The other ‘head’ of Keter is called ‘Arich Anpin’. Atika Kadisha is above Arich Anpin, which means that Atika Kadisha has a finer and light. Rabbi Ashlag explains that the higher levels have a purere light than the ones below.
The Chokmah (Wisdom) of Arich Anpin is conceald and none buy himself can know it.
The prophet tells us that we can’t grasp this level and we can not get to a point of undestanding the ‘thoughts’ that come from Arich Anpin, the supernal Keter.
“כִּי לֹא מַחְשְׁבוֹתַי מַחְשְׁבוֹתֵיכֶם וְלֹא דַרְכֵיכֶם דְּרָכָי נְאֻם יְהוָה”
“For My thoughts are not your thoughts, Nor are your ways My ways,” declares YHVH.”
Explanation to this paragraph will come later
Daily Zohar # 2538 – Ha'azinu – You can't understand this head