The three columns of Zeir Anpin support the Shechina and for that she’s called ADNY. Abraham was able to see the Shechina and this name only after he circumcised himself. The Holy One Blessed Be He waited for Abraham’s circumcision in order to give him a holy son, which is Isaac.
“וְהַמַּשְׂכִּלִים יַזְהִרוּ כְּזֹהַר הָרָקִיעַ וּמַצְדִּיקֵי הָרַבִּים כַּכּוֹכָבִים לְעוֹלָם וָעֶד”
“And those who are wise shall shine like the brightness (Zohar) of the sky above; and those who turn many to righteousness, like the stars forever and ever.”
For his actions Abraham merited to see the Shechina and the source of Light from the upper levels. Rabbi Ashlag explains that even though Abraham was connected to Malchut he received light from the upper levels up to Atzilut.
The word Zohar means ‘radiance of light’. Because Abraham was the first to circumcise himself for the purpose of opening the channels to the spiritual level, he could reach all the way to Keter. The Zohar describes that light as the Zohar of heavens.
The ‘Zohar’ is the Light of Binah that comes out of Arich Anpin. Chokmah and Binah comes from this light with constant unification that delivers flow of light to the lower worlds. In the world of Atzilut, Chokmah and Binah never separated because it’s the source of light to all the lower worlds. Below this level, the unification of Chokmah and Binah comes after a process.
The light of the ‘Zohar’ gave Abraham the power to connect to all levels of the Tree of Life and enable him to have mind over matter. He also wrote the Book of Formation that high level Kabbalist can use to manifest materials with the power of words.
This highest level that is described here as Zohar is like the stream of thoughts the comes to our mind and drives our actions in this world. Even though the thoughts are constantly flowing, we need to make efforts to connect our lower levels of Chokmah and Binah that are the right and left brain with thought process to continue the potential force of the original thoughts into actual.
Our Zohar study connects us to higher spiritual levels and help cleanse the flow of thoughts that come into our minds. As we progress with our studies and faith we experience greater levels of purity of thoughts that drive us to positive actions. It also clears a lot of judgments from our correction process.