484. This SMALL YUD is always ever recorded, THAT IS TO SAY THAT IT IS MARKED UPON ALL THE GRADES OF MOCHIN, FOR WITHOUT IT NO GRADE IS REVEALED. It is the sign of Shabbat, the sign of the Tefilin, the sign of the festival days, the sign of Shadai that is recorded "on the doorposts of your house and on your gates" (Devarim 6:9), WHICH IS THE SECRET OF THE YUD OF SHADAI (SHIN DALET YUD), so that Yisrael will be impressed with it on their straps, NAMELY ON THE KNOT OF THE HAND TEFILIN WHICH HAS THE SHAPE OF THE LETTER YUD, and on their covenant, NAMELY THE CIRCUMCISED MEMBER, SO THEY WILL BE MARKED THROUGH IT as the children of Malchut, the household of the palace of the Holy King, WHICH IS MALCHUT CALLED 'PALACE'. THIS MEANS THAT THEY SHOULD RECEIVE THE MOCHIN OF LOWER CHOCHMAH, WHICH ARE DRAWN DOWN FROM MALCHUT, AND THIS THEY MERIT BY KEEPING GUARD OVER THE COVENANT and BY ENGAGING IN the Torah. They are marked with the upper Yud OF YUD HEI VAV HEI, NAMELY THEY MERIT UPPER CHOCHMAH, for they are the children of the Supernal King. It is as we have taught, and so it is said: "You are the children of Hashem your Elohim" (Devarim 14:1) IN THE SECRET OF THEIR RECEIVING FROM YUD OF YUD HEI VAV HEI, WHICH IS FROM ZEIR ANPIN, WHO IS CALLED YUD HEI VAV HEI.
488. And for this reason, all demons and spirits are fearful of the Yud of Shadai (Shin Dalet Yud), NAMELY THE SIGN OF THE COVENANT, which is the noose ring from the chain, and immediately on seeing THE YUD OF SHADAI on the doorposts of the gates they flee, for about THE YUD OF SHADAI it is said: "to bind their kings with chains, and their nobles with fetters of iron" (Tehilim 149:8). And even more DO THEY FLEE AWAY when they see it on the Tefilin that are on the arms, NAMELY IN THE KNOT OF THE HAND TEFILIN. And of those who are marked with this sign of the covenant on their own flesh, ABOUT THEM IT IS SAID: "and the stranger that comes near shall be put to death" (Bemidbar 1:51); NAMELY THE EVIL INCLINATION THAT IS CALLED 'STRANGER' SHALL BE PUT TO DEATH, for stranger is none other than the Evil Inclination, that is similar to all the beasts and birds of prey, AS ABOVE.