Chapter 1, Mishna 1
Background on Shabbos, carrying, earlier stringencies of the prophets due to widespread desecration and leniencies of the Sages to protect Shabbos while keeping it a delight. How do we make carrying possible in a three-sided alley that connects several private courtyards to a main thoroughfare? When does a crossbeam work? When is it too high? When is the entrance to the alley too wide? Why is this law expressed differently than the requirements of a sukkah? How do sideposts work? What is the connection between a simple alley and the magnificent entrance of the Sanctuary in the Solomon’s Temple?