Sefirat HaOmer—A Study in Klal u’Prat
The forty-nine days between Passover and Shavuot are called the days of Sefira or the days of counting Omer—Sefirat HaOmer—when Jews count every day as
May 27, 2022 / 26 Iyyar 5782
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Shavuot
Shavuot (in Russian)
Шавуот Праздник Дарования Торы Aлександр Полторак Закончился праздник Песах. Все евреи поспешно убрали пасхальную посуду в особые шкафы или на чердаки до следующего Песаха.
May 19, 2020 / 25 Iyyar 5780
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Counting Weeks and Days
There is a Biblical Commandment to count the days between the Passover and Shavuot, the “Feast of Weeks” (a.k.a. Pentecost). We start counting on the
April 28, 2020 / 4 Iyyar 5780
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Fitting Pieces of the Puzzle Together
Meditations on the Maaseh Merkavah – IV This is the fourth and the final installment in the series of posts related to Ezekiel’s prophesy, Ma’aseh
June 21, 2019 / 18 Sivan 5779
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Collapse of the Wave Function
Meditations on the Maaseh Merkavah – III This is the third installment in the series of posts related to the Ezekiel’s prophesy, Maaseh Merkava, “The
June 18, 2019 / 15 Sivan 5779
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Relational Space
Meditations on the Maaseh Merkavah – II This post is a sequel to my previous post, “Space – Between Future and Past.” For background information,
June 17, 2019 / 14 Sivan 5779
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Space – Between the Future and the Past
Meditations on the Maaseh Merkavah – I We do science by studying nature. We study physics in a lab, peering into space or working out
June 13, 2019 / 10 Sivan 5779
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613 Degrees of Freedom
Passover has ended. All Jews hastily return their Passover dishes to storage in special cabinets or the attic until the next Passover. After an eight-day
June 6, 2014 / 8 Sivan 5774
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Suspected Adulteress as a Schrödinger Cat
In quantum mechanics, the state of a physical system is described by the so-called wave function (or the “wavefunction”). All attempts by Schrödinger, who first
May 30, 2014 / 1 Sivan 5774
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Carpe Diem
As we have discussed in the post, It’s the time, stupid, Pharaoh never got the message that it’s all about mastery of time. To make
January 2, 2014 / 1 Shevat 5774
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Freedom in Space, Time and Spirituality
And the entire Mount Sinai smoked because the Lord had descended upon it in fire, and its smoke ascended like the smoke of the kiln…
May 18, 2013 / 9 Sivan 5773
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Passover, Shabbat and the Principle of Least Action
There is hardly a Jewish holiday more widely celebrated than Passover (Pesach). Jews of all denominations, affiliations, and levels of religious observance, if any at
March 31, 2013 / 20 Nisan 5773
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