“וַיַּעַשׂ יְהוָה אֱלֹהִים לְאָדָם וּלְאִשְׁתּוֹ, כָּתְנוֹת עוֹר–וַיַּלְבִּשֵׁם.”
“And the LORD God made for Adam and for his wife garments of skins, and clothed them”
Before the sin, Adam and Eve were dressed with garments of light from the highest level of Zeir Anpin. The supernal Light was surrounding them. After the sin they lost the upper Lights and received garments of the world of Malchut.
ואת אהרון ואת בניו תקריב והלבשתם כתנות
The Zohar reveals that the garments Moses put on Aaron and his sons were like the garments of Adam before the sin. These spiritual garments were required for them to connect to the higher levels and draw Light to the world.
The word כתנות שש means garments of six and it refers to the six sefirot of Zeir Anpin.
The garments of ‘skin’ separated Adam and Eve from the unlimited connection to the levels of Chokmah and Binah where they could see the entire creation including the future.
ותפקחנה עיני שניהם
The word for ‘skin’ , ‘עור’ also has the meaning of ‘blind’ that is the aspect of this world where we don’t see the truth or the future.
והולכתי עורים בדרך לא ידעו
“I will lead the blind by ways they have not known, along unfamiliar paths I will guide them; I will turn the darkness into light before them and make the rough places smooth. These are the things I will do; I will not forsake them.”
In the future the Holy One Blessed be He, will open the eyes of the righteous people who have the merits and they will be able to see the supernal wisdom in ways that were never available to them.
In my humble opinion, the Pineal gland is the eye that can see into the spiritual levels of Chokmah and Binah. People with special senses and psychic abilities have this ‘eye’ connected to the higher level.
I suggest a studying of the pineal gland (online or other sources). Make what is necessary to have this brain part purified on the physical level. Keep daily Zohar study, make spiritual connections and acts of sharing to have spiritual cleansing. With this one can elevate his spiritual senses and abilities to see the truth in this world.