[Avodah] The Protection Offered by a Mezuza

[Prof. Levine]

At 06:58 PM 12/23/2017, Harav Baruch Gigi wrote:
The following is from RSRH's commentary on Devorim 6:9  And write 
them upon the [door-]
posts of your house and upon your gates.

The mezuzah is not an amulet; in and of itself, it does not protect the
house. Only insofar as they shape their lives in accordance with the mezuzah 's
content can the people within the house expect help and protection
from God, the "All-Sovereign and All-Sufficing," in all the vicissitudes
of domestic life. With this intent it is our custom to adorn the
outside of the mezuzah with the Name shin-daled-yud.