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15 votes

Sefaria and Rabbinic Endorsements

"Sefaria is one of my favorite things in the entire contemporary Jewish world. It is taking cutting-edge technology and doing something very spiritual by it. What it is doing is opening up the ...
Yair Rand's user avatar
  • 484
11 votes
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Is it achievable to keep all of Halacha?

I once heard an amazing, simple, vort from a rebbi of mine. He used to say it each year around this time. The Gemara in Avoda Zara 20B says the following; ת"ר (דברים כג, י) ונשמרת מכל דבר רע שלא ...
Chatzkel's user avatar
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10 votes

Building a Mikva Upstairs

There is no Halachic issue SA YD 201.7 Rema הגה: מותר לעשותו על הגג ובלבד שלא יהיה תוך כלי או אבן אחת שחקקו ולבסוף קבעו אבל חבור אבנים הרבה לא מקרי כלי (תשובת הרשב"א סימן ת"ת):‏ Its allowed ...
kouty's user avatar
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9 votes
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Torah songs, and earworms, in the bathroom

R' Shlomo Zalman Auerbach quoted in הליכות שלמה (הלכות תפילה פרק עשרים סימן יא אות כא) ruled that there is a distinction between recital of pesukim in praise and song (דרך שבח וזמרה) and studying (דרך ...
Shoel U'Meishiv's user avatar
9 votes
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Is it assur to have a mattress that has wool and linen in it?

Rav Yisroel Belsky ztl writes In olden times, the very greatest medakdekim b’mitzvos, those Jews who were exceedingly meticulous in their observance of mitzvos, were careful never to sit on cushions ...
NJM's user avatar
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7 votes

May one celebrate April Fool's Day?

I think it'll be a bit dfficult to give overall rules about whether 'pranks' are allowed, since what one might consider a 'prank' is quite varied, with some items being forbidden and some being ...
Salmononius2's user avatar
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7 votes
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Book on the laws of Shabbos

There are multiple options depending on how much of a reference book you are searching for vs. something which is readable cover-to-cover to rehearse. The 39 melochos is an amazing reference work but ...
mbloch's user avatar
  • 53.1k
7 votes

Intimacy, עוֹנָה and Narcotics

"One is not allowed to be drunk during intimacy with one's spouse. See... Issurei Biya 21:12." The Rambam does not use the word אסור (forbidden) as he does by the case of thinking of ...
Deuteronomy's user avatar
  • 8,772
7 votes
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Chazal contradicting science

This is a very broad and complex topic, with multiple opinions in every direction, and the practical halacha depends on the topic being studied. Entire books have been written on it, so it is not easy ...
mbloch's user avatar
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7 votes
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Putting parents with mental issues in nursing homes

Ask your LOR if this is relevant but the Shulchan Aruch Yore Deah 240:10 says that if one can not deal with their elderly parents due to serious mental health defects he should have others do so: מי ...
Schmerel's user avatar
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6 votes
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Can you crack and roll a boiled egg on Shabbat, even if the rolling will tear the letters printed on the egg?

In the English version of Shemirath Shabbath k'Hilchata (11:10), R' Yehoshua Neuwirth is strict and writes: When removing the shell from an egg, one should be careful not to break through any ...
mbloch's user avatar
  • 53.1k
6 votes

How did Gdoley Israel react to the landing on the Moon?

Rav Menachem Kasher wrote the first sections of his האדם על הירח in response to this event. Throughout the work he discusses the moon landing from hashkafic and halachic perspectives.
DonielF's user avatar
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6 votes

How did Gdoley Israel react to the landing on the Moon?

Rabbi Yaakov Kamenetsky and the Moon landing אמת ליעקב פרשת בראשית ודברי רמב"ן אלה הם שעמדו לי בשעה שראינו איך שבני אדם יורדים מעל המטוס ע"י סולם על גלגל הלבנה, וחשבתי בלבי מה יענה כעת הרמב"ם ז"ל ...
IsraelReader's user avatar
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6 votes

Biometric screening on Shabbat

Even if the "listening" circuit is always on, the "action" circuit is turned off until activated. When anything comes near the sensor, it immediately springs into action, searching ...
ElonMusk's user avatar
  • 477
6 votes
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Sh’ma time on a long travel

As the OU writes "always say the prayer service based on the day and time where you are at the moment you are ready to pray" To calculate the right times, you can use tools such as The Chai ...
mbloch's user avatar
  • 53.1k
6 votes
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Eye donations in Halacha

R Chaim Jachter has a very good summary of relevant opinions Rav Waldenberg and Dayan Weisz categorically forbid cornea transplants because of the issue of denigrating the dead Rav Isser Yehuda ...
mbloch's user avatar
  • 53.1k
5 votes

May one celebrate April Fool's Day?

Fooling others [Jews] by saddening them even minutely is prohibited Deorayso even if they forgive afterward: Mishna Bava Metziyah 58b: כשם שאונאה במקח וממכר כך אונאה בדברים: לא יאמר לו בכמה חפץ ...
Al Berko's user avatar
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5 votes
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Is one allowed to sleep in a room/house where there are images of JC and other avodah zarah?

dinonline (here and here) answer a very similar question Before getting into the technical halachic aspect if it is permitted or not, it is surely not advisable to stay there when you are prone ...
mbloch's user avatar
  • 53.1k
5 votes

Retroactive psak and conversions

Revised psak can be three different things. 1) A Rabbi or Beis din, realizes they made a big mistake. (certain pigs are kosher ... ooops! wrong) So after the psak (legal decision) is issued (example:...
David Kenner's user avatar
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5 votes

Book on the laws of Shabbos

Piskei Shabbas by Rabbi Eliezer Padwar is also very helpful sefer. It is 4 volumes (Yom tov as one vol) . It is in English and has footnotes. Many of the psakim are from Rav Moshe Feinstein ,and the ...
sam's user avatar
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5 votes
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Contemporary views on the Rambam's diet guide

Following on from my comment above, the Mishpacha ran a piece here, which relates how the timeless tips of Rambam are equally relevant today. The article brings many points made by the Rambam and ...
Dov's user avatar
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5 votes

Corona "parties" for children

Regarding "corona parties", one contemporary Rabbi did indeed rule that it is forbidden to purposely get together to infect oneselves. Rabbi Yehoshua Pfeffer is quoted in this late 2020 ...
robev's user avatar
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5 votes
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Pidyon Peter chamor on c section born donkeys

While we have משניות that teach us that a יוצא דפן is excluded from בכור בהמה טהורה (see בכורות ב:ט) and בכור אדם (see בכורות ח:ב), this halacha is not mentioned explicitly when the mishna deals with ...
EraserX's user avatar
  • 2,768
4 votes

Book on the laws of Shabbos

The 39 Melochos by Rabbi Dovid Ribiat. I haven't used it that often myself, but in my experience of observing others this seems to be one of the most, if not the most, highly regarded English books ...
Alex's user avatar
  • 49.6k
4 votes
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Do objects of idolatry contaminate?

Yes, idolatrous items contaminate, and things that get mixed with objects of idolatry are forbidden property. However, these are two separate laws. The Rambam has already said that objects of ...
b a's user avatar
  • 24.8k
4 votes

What are the various opinions as to what the Techeiles is?

Radzyner Techeiles Radzyner techeiles is made from the "ink" that is secreted from the Sepia Officinalis, i.e. the common cuttlefish. The Radzyner Rebbe, R. Gershon Chanoch Henoch Leiner was the ...
Alex's user avatar
  • 49.6k
4 votes

When selling a house, what pieces of furniture go with it?

The Rambam (in Hilchot Mechira 25:5) brings the following halacha When a person sells a house, he also sells the oven, the range, the door frames that are attached with mortar, the door, the beam,...
mbloch's user avatar
  • 53.1k
4 votes

How did Gdoley Israel react to the landing on the Moon?

The Lubavitcher Rebbe's reaction from Chabad.org: Yes, the human being has performed something magnificent. There is much in which to take pride. But does that make us so large as to displace G‑d? ...
user16403's user avatar
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4 votes

How did Gdoley Israel react to the landing on the Moon?

As reported here R Shlomo Goren proposed to change the text of kiddush levana, the monthly blessing on the moon's renewal the answer began to emerge within hours of the historic Apollo 11 moon ...
mbloch's user avatar
  • 53.1k
4 votes

What method is used to halachically pluck a chicken's feathers after shechita

I can't say that all Kosher meat processors follow the same process but some use a "picker" machine which works with agitation of the chicken against small rubber parts that de-feather it ...
Geltman's user avatar
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