Posting may be a bit off this week because I have to give a shiur on Shabbos and need time to transform some loose thoughts into something coherent - please bear with me, because while in general my blogging is more "thinking out loud" rather than a finished product, this week may be messier than usual.
On that note, can someone who knows what the Rogatchover means by “peula hanimshechet” please help me come up with an explanation in English that is understandable? I keep working the idea over in my brain into various-Brisker type formulations, but I don’t think I am capturing what the Rogatchover really meant. Some examples (culled from the fantastic sefer “M’Fa’aneiach Tzefunot”):
1) The Midrash writes that when David haMelech was in the bathhouse and was saddened because he found himself bereft of any mitzvah performance at that moment, he took heart from the mitzvah of milah that is always present. If the mitzvah of milah is simply a one time act, it should have given no more comfort than tefillin, lulav, or sukkah. It must be that milah is a peulah hanimshechet….
2) The mitzvah of taking lulav is not just a one time act that must be performed at some point during the day of Sukkot, but is a peulah hanimshechet through the entire day, hence the lulav is huktzah l’mitzvaso the entire day.
3) Pinchas’ act of zealotry is described as “heishiv es chamasi”, past tense, but the pasuk continues “vayichaper al Bnei Yisrael” indicating a continuous act of kaparah, a peulah hanimshechet l’doros…
In the first case, a Brisker would probably say that milah involves creating a chalos of being mahul which is a status, not just an isolated act. One might even argue in the second case that lulav creates a status of being a mitzvah object which transcends the actual act, or one might say that the chiyuv of lulav is a din in the cheftza shel lulav, which is why it is huktza beyond the time that the kiyum hagavra is finished. But I don’t think these formulations really are what the Rogatchover meant – the Brisker reformulation shifts the focus from action to status; the Rogatchover I think is distinguishing between two types of actions. I have an idea, but I will wait to see if anyone else has thoughts before posting.