“The name Shad-dai on your door greets the whole of your household; it consecrates your home, making it into a tent of Abraham, which requires G‑d as its sole protector...”
“If people knew the advantages of having a mezuzah on the door, they would not transgress this commandment; for I am convinced that no demon can harm a house properly provided with mezuzoth.”


Mezuzah The first quote in this section is:
Hirsch, Rabbi Samson R. Judaism Eternal. New York: Soncino, 1956. 18.
The second quote is:
The Maharam on Or HaChaim, par. 213. Quoted in Agus, I. A. Rabbi Meir of Rothenburg. New York: Ktav, 1970. 265.
Thanks for your interest.