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Answer: There are a few issues of muktzeh involved here. One is whether to consider a heating pad a kli shemelachto l’issur or a kli shemelachto l’heter. On the one hand, in order to use it, one must put it on, which it is forbidden on Shabbat. On the other hand, if one prepared it before Shabbat (by keeping it on or setting a Shabbat clock), then further use does not include melacha. (We are not delving into issues of medical activity on Shabbat. While not a trivial question, with the level of need involved, there are ample grounds to permit it – see The Halachos of Refuah on Shabbos, p. 26.). Rav Moshe Feinstein (Igrot Moshe, Orach Chayim III:49, regarding an electric fan) treats such items as kli shemelachto l’issur. However, regarding a case very similar to ours, an electric blanket, he raises the serious possibility that it is a kli shemelachto l’heter. This is also the opinion of Rav S.Z. Auerbach (Minchat Shlomo I:9) and Rav Asher Weiss (Shut Minchat Asher I:33), although none of them was willing to rely on this heter alone. In any case, it is permitted to use a kli shemelachto l’issur for a permitted use (l’tzorech gufo) (Shulchan Aruch, OC 308:3) and this would be a classic example.
A further problem is the fact that the heating pad has a filament that becomes glowing hot. In certain areas of halacha, this is considered like fire (see Shemirat Shabbat K’hilchata 43:4 regarding using an incandescent light for hadlakat neirot Shabbat in a case of need). We find that a lit ner (oil cup) is full muktzeh, which cannot even be moved for a permitted use (Shabbat 47a). This is because the flame is muktzeh (more than a kli shemelachto l’issur), and the oil and cup are a bassis l’davar ha’asur (something which is supporting that which is muktzeh). So ostensibly, the whole pad is a bassis for the heat-emitting electrical wires, which are the heart of the device (Orchot Shabbat 19:(246)).
Bemare Habazak - Rabbis Questions (649)
Rabbi Daniel Mann
373 - Partial Participation in a Wedding
374 - Heating Pad on Shabbat
375 - Switching Chazanim at Ashrei
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Even according to the Chazon Ish’s explanations, the heat-producing electricity might not be like a flame (see Minchat Shlomo I:14, who analyzes this Chazon Ish). In any case, several contemporary poskim posit (including Igrot Moshe, OC III:50), mainly in the context of an electric blanket, that we do not view the heated wires and the electricity therein as a separate unit like a flame is. Rather, it is subsumed under the overall utensil of the blanket, which is either a kli shemelachto l’heter or kli shemelachto l’issur (see above), but, either way, it can be moved as part of its use. Rav Ovadia Yosef (Yechaveh Da’at V:28; see also Chelkat Yaakov, OC 118) adds also that the electricity in the wires are not comparable to a flame because the results are not visible. However, many, including Rav S.Z. Auerbach (Minchat Shlomo I:14), permit to move even lamps whose electricity gives off a noticeable light. In the final analysis, then, it is permitted to use the heating pad.
Rav Moshe Feinstein (Igrot Moshe ibid.) required attaching a reminder to the controls and the wall socket so that one not change the setting or unplug it. Rav Ovadia (Yechaveh Da’at ibid.) considers that a new gezeira and therefore unnecessary, although he also wrote that it does not hurt to be stringent. All agree that one does not have to be concerned lest he inadvertently pull it out of the wall, against his intention.
Rabbis in Midrash
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Shlach Lecha "Why So Many Don't Make Aliya?" - Parshat Shlach
This short article deals with the weird phenomena that every single time Am Yisrael is meant to enter the Land of Israel, throughout the Tanach, 2nd Temple and until today, they "chicken out" and look for excuses. What's the problem with this mitzvah that proves so challenging. The article, based on sources, suggests that the difficulties of Eretz Yisrael is precisely her secret and beauty!
Kuzari -Rabbi Ari Shvat Kuzari class 4
The class deals with Islam and how the Muslim tries convincing the King of the Khazars, and why he was also rejected.
Beha'alotcha JEWISH STATE= GUIDE TO G-DLINESS & SELFLESSNESS
A Jewish State not only is a good idea, but educates us towards selflessness, altruism and G-dliness in our daily lives.
Ein Aya In Zion Even the Smoke of the Bark is Sweet
Just as Jewish nationalism is different from others, so too our capitol of Jerusalem is totally different than other national capitols. Rav Kook beautifully explains the passage in the Talmud that the trees of Yerushalayim were cinnamon trees.
Kuzari -Rabbi Ari Shvat Kuzari class 3
The second speaker invited to convince the Khazar King is the Christian, who presents their beliefs. Even before the questions of the King, "between the lines", the author R. Yehuda HaLevi already begins disproving them.
Ein Aya "Intimacy: Love, Life & Giving or Egocentric Taking & Expiration"
Today, many confuse between intimacy in marriage, based on love, giving and life which are diametrically opposed to empty "sex", pornography and prostitution which destroyed the Beit HaMikdash. The practical importance of clarifying this topic in today's western society is obvious, especially for young adults.
Kuzari -Rabbi Ari Shvat Kuzari class 2
The King of the Kazars, in his search for truth, starts by inviting the philosopher. This is a "crash-course" on Aristotelian philosophy and the reasons why the king is not convinced. Through this dialogue, R. Yehuda HaLevi already foreshadows some of his central ideas that will appear later.
Shavuot "Love of Torah = Love of Israel"- for Shavuot
People often identify Judaism as just a religion, but upon examination, we see, even halachically and explicitly in the siddur, that the Torah is dependent upon Am Yisrael, Jewish nationalism.
Ein Aya The Middle-Child & Anti-Tzni'ut Syndrome- Negative Attention
Although tzni'ut is for men just like women, Rav Kook deals here with the sources in Yishayahu and the Talmud which deals with the special problem of lack of tzni'ut in women's dress and actions, where it's not just a problem of midot and character traits, but also can include practical, social and national ramifications, as well, which caused the destruction of the Beit HaMikdash and exile from Israel. The class continues the previous one (Ayn Aya Shabbat vi, 29), and is a must for all educators and parents of high-school aged and young adults.
P'ninat Mishpat P'NINAT MISHPAT: A Mess of Loans, Repayments and Grievances – part II
based on ruling 83033 of the Eretz Hemdah-Gazit Rabbinical Courts
based on ruling 83033 of the Eretz Hemdah-Gazit Rabbinical Courts
