Parts of the Sh'ma are written on a small scroll which is then rolled up and put inside a mezuzah; when the Bible said to put the Law on their doorposts, they did. A Mezuzah is a piece of parchment, often in a decorative container, that hangs on a doorpost. It is a constant reminder of their identity.
Hear O Israel
Pay attention, people! Witness! Bear witness to the sovereignty of God.
The Lord Our God, the Lord is One
But...this is more than a declaration of monotheism. The Trinity is in there!
There is a word for "singular" - and the word here is not that.
- The two shall become ONE flesh
- All the parts of the tabernacle would become a SINGLE WHOLE (Ex. 26:6)
- Two sticks become ONE is the hand of God (Eze. 37:19)
"The Lord is ONE" - three entities that are inseparable in purpose and unity, joined together in One LORD - the Trinity.