brought to you by Kollel Iyun Hadaf of Yerushalayim
& Revach l'Neshamah - http://www.revach.net
1. The Gemara explains why the Mishnah found it necessary to say that a woman may tie and/or untie her apron.
2. The Gemara teaches that there are three categories of knots used to tie shoes, and it lists different laws that pertain to each one.
3. The Gemara discusses what one should do if a shoelace tears, rendering the shoe unsuitable for wearing.
4. If a man wears his left shoe on his right foot, and his brother's widow performs Chalitzah with it, the Chalitzah is valid.
5. Rebbi Zeira: If the early generations were like angels, then we are merely humans.
A BIT MORE
1. The Gemara explains that the case is where a woman has two places on the apron where she ties it, and it is possible to leave one of them tied for a long time while tying and untying the other frequently in order to fasten or remove the apron. Since one might have thought that she will tie one permanently (even though it is normal to constantly tie and untie both), the Mishnah needed to teach that we do not suspect this, and thus tying and untying both on Shabbos is permitted.
2. For example, one who ties a knot in order to leave it as a knot, with no intention to ever untie it, is liable for tying on Shabbos mid'Oraisa. In contrast, normal shoelaces that are tied and untied every day are permitted (according to Rashi's understanding of the Gemara).
3. If a shoelace tears while one is in a Reshus ha'Yachid, such as a house or yard, he should just leave it there and put on a different pair of shoes. If it happens in a public area such as a Karmelis, he is allowed to use a piece of straw or a reed that would be fit for an animal to eat in order to temporarily tie his shoe.
4. This is because it is indeed a proper shoe, even though it is not formed to be a right-foot shoe.
5. He continues to say that if the early generations were like people, then we are like donkeys, and not even like the famous donkey of Rebbi Pinchas ben Yair (which refused to eat forbidden grain).
Next Daf Index to Revach for Maseches Shabbos