[Avodah] eating matza for 7 days

[Micha Berger]

On Wed, Apr 15, 2009 at 11:16:52PM +0300, Eli Turkel wrote:
: RMF claims that the mitzva of yishuv ha-aretz is a mitzva kiyumit.
: R. Avrahaam Shapira disagreed and said that a mitza kiyumit is like tzizit
: where the choice is whether to wear a 4 cornered garment or not. However, once
: one wears a 4 cornered garment one is required to wear tzizit.
: He claimed that there were no examples of a mitzva kiyumit where one
: had complete freedom whether to keep the mitzva or not.

We discussed this before, volume 7. Even tzitzis isn't clearcut. I
argued from the MB 13:9 that he holds it's qiyumis, not a machshir.
Which is why wearing a beged without tzitzis is a bitul asei, not an
issur. For that matter, how it's possible to fulfil half the mitzvah
without techeiles, rather than the beged being assur or techeiles not
being a machshirah. There is no bitul asei if you don't believe you can
get your hands on any. Also, why kavod haberiyos doesn't require dropping
your tallis in public the moment you notice a pesul.

Rav Dovid Lifshitz also distinguished between a mitzvah machshirah and
a mitzvah qiyumis.

How about having a third child, isn't that a mitzvah qiyumis? (I think
the Meshekh Chokhmah says so.)

And tefillin. (Which came up in my discussion with RRW about changing
halakhah -- I argued that tefillin on ch"m isn't a chiyuv anyway; and
if you have a reason not to wear them beyond laziness, it's not mechzei
keshiqra. As on Shabbos.)

Tir'u baTov!
-Micha

-- 
Micha Berger             Today is the 11th day, which is
micha at aishdas.org        1 week and 4 days in/toward the omer.
http://www.aishdas.org   Netzach sheb'Gevurah: What is imposing about
Fax: (270) 514-1507                            strict justice?