“קַח, אֶת-הַלְוִיִּם, מִתּוֹךְ, בְּנֵי יִשְׂרָאֵל; וְטִהַרְתָּ, אֹתָם.”
“Take the Levites from among the sons of Israel and cleanse them.”
God instructed Moses to take the Levites from the Israelites and purify them. The Levites are the aspect of the Left column, Gevurah. Before serving in the Holy Temple their energy needed to be balanced. To reduce the aspect of the Left that draws judgments, the Levites had to shave their heads. Hair is Left column and is strong in channeling energy. The Zohar adds that for similar reasons, women should cover their hair to protect their energy. The Levites in the Holy Temple did a lot of the work for the priests and, as Left, they were naturally great in supporting them.
“וְהֵנִיף אַהֲרֹן אֶת-הַלְוִיִּם תְּנוּפָה לִפְנֵי יְהוָה, מֵאֵת בְּנֵי יִשְׂרָאֵל; וְהָיוּ, לַעֲבֹד אֶת-עֲבֹדַת יְהוָה”
“And Aaron lifted the Levites, elevated before YHVH from the sons of Israel, that they may qualify to perform the service of YHVH”
When Aaron ‘elevated’ the Levites, the Left, before YHVH, he connected them to the upper level and united them with all the priests, the Right, so the work in the Holy Temple would be in balance.
For those who are serving the Holy, hair is a tool of great connection.
“כָּל יְמֵי נֶדֶר נִזְרוֹ תַּעַר לֹא יַעֲבֹר עַל רֹאשׁוֹ עַד מְלֹאת הַיָּמִם אֲשֶׁר יַזִּיר לַיהוָה קָדֹשׁ יִהְיֶה גַּדֵּל פֶּרַע שְׂעַר רֹאשׁוֹ”
“’All the days of his vow of separation no razor shall pass over his head. He shall be holy until the days are fulfilled for which he separated himself to YHVH; he shall let the locks of hair on his head grow long.”
The hair of the beard represent the connection to Arich Anpin, which is one of the heads of Keter, together with Atik Yomin.
The 13 attributes of God come from Arich Anpin and bring wisdom and mercy to all the worlds below.
Those who understand the deeper meaning of hair grow their beard. A proper beard supposes to cover the sides of the face and around the mouth. Many keep long side-locks because this hair have special connection ability. Rabbi Ashlag and Rabbi Brandwein, and almost all great Tzadikim, had long side-locks. They actually never trimmed their facial hair.
There is a story about the Baba Sali (Rabbi Yisrael Abuchatzeira), a great kabbalist from previous generation. He taught his students the benefits of growing beards and they followed their master. After a while one of them came without a beard. To the question of “what happened?” he replied “My wife forced me to shave it”. The Baba Sali told his student to go back to his wife and tell her that if she doesn’t let him grow a beard, she will grow one herself.
Knowing Baba Sali’s powers, she made sure her husband grew back his beard and kept it on.
In dreams, the state of hair on a person represents his energy.
King David had red hair and, as we learned earlier, it is the aspect of the left column, judgment, and Malchut. The Zohar tells us (Tikun 70) that he had 7 shades of Gold in his hair. This represents wider aspect of his energy and the fact that God anointed him as king on the level of Malchut.
It is interesting that the president of the USA has gold hair like King David and he was unexpectedly ‘anointed’ like him.