Romans 14:17 - "the kingdom of God is not in eating and drinking, but in
righteousness and peace and joy in the Holy Ghost."

The shofar is not a man-made instrument. God created and originated it

Matthew 14:36 - The sick begged Him that they might only touch the
Tzitzis of His garment and as many as touched it were made perfectly well.

The real mezuza is the scripture itself which is inside the cover rolled up like a scroll.