For this has always been the key belief of Judaism. Chapter 5 which precedes the passage contains the Ten Commandments, and that These words refers to them.
A number of the early Tefillin found therefore contain the Ten Commandments.
The 1733 illustration of the box for the arm is cylindrical but this would be unusual today.
Inside the boxes are the four quotations hand-written by a scribe on leather as a Torah scroll is written.
There was a difference of opinion between Rashi and his grandson Rabbenu Tam as to the order of the four quotations.
The problem about this interpretation is that the traditional finger for putting the wedding ring on is the first and not the second finger.
The box for the arm has the four quotations written one after the other on a long strip.
While the box for the head has four divisions inside each, one of the quotations is folded up and secured.
The knot is thought as being in the shape of the Daled.
While see the yod in the seven winds round the arm added to the three round the finger.