All the brains inside the cavities in the head – Chochmah, Binah and Da’at of Israel Saba and Tevunah are connected to the skull. They are Chochmah, Binah and Da’at of Aba and Ima, which is the highest brain. All the hairs come down from the three cranial cavities that are connected to the highest brains. They are tangled in both purity and defilement, (that is, they are the reasoning regarding Levitical cleanliness and the reasonings and warnings regarding defilement), in all the reasons and secrets, both concealed and apparent.
All the brains are therefore alluded to in “I am Hashem your Elohim…” (Shemot 20:2). This refers to the 248 positive commandments and 365 negative commandments included in the verse. They are sequenced according to their illumination in the halo of the head, that is, on the four brains of the skull. Their illumination penetrates the three cranial cavities inside the head.