sefirah

Mezuzah and Time

Bo: Exodus 10:1 – 14:16 The Erev Shabbat parshat Bo (the Eve of Sabbath of the week when we read the Torah section Bo) 2014 was my lucky day – I seem to have found an answer to a nagging question of many years. During several years from 1989 to 1996, I had been working on a book on Mezuzah. This was not a book about halachot (ritual laws) of mezuzah – there were many books on that subject – this was a book about the meaning of mezuah – its significance in Jewish history, philosophy, ethics, and mysticism. By 1996, the book was finished and I signed a contract with the leading publisher of English Judaica – Jason Aronson. I was supposed to deliver the finished manuscript in a few months, but [...]

By Alexander Poltorak|2017-02-02T22:34:18-05:00January 5th, 2014|Bo, Exodus (Shemot), G‑d, Names of G‑d, Parshah, Pentateuch (Chumash), Shemot, Time, Uncategorized|0 Comments

Entangled Sisters

The story of entangled twins is continuing in the Torah portion Vayeitzei (Genesis 28:10–32:3.) Structurally, it is very similar to the story in the previous Torah portion, Toldot (see “Entangled Twins”). In this portion, we again read about two entangled siblings—albeit, this time, sisters—about deception and spontaneous symmetry breaking. Two sisters were Rachel and Leah. Moreover, according to Midrash, Rachel and Leah were also twins (Seder Olam Rabbah).[1] As inseparable twins, they were “entangled,” as it were. They were somewhat opposite—one introvert, the other extrovert; one beautiful, the other, perhaps not so much (she had “weak eyes”): Now Laban had two daughters: the name of the elder was Leah, and the name of the younger was Rachel. And Leah’s eyes were weak; but Rachel was of beautiful form and fair to look upon (Genesis 29:17). Rachel and [...]

By Alexander Poltorak|2020-11-26T16:59:43-05:00November 8th, 2013|Entanglement, Genesis, Parshah, Pentateuch (Chumash), Physics, Quantum Theory, Symmetry, Vayetze|0 Comments

Cosmological Rosh HaShanah

This Rosh HaShanah I had the strangest dream. I dreamed that I was giving a lecture in cosmology at a university when I suddenly realized that it was Rosh HaShanah. I panicked… What was I doing at the university on such a day instead of being in my synagogue, praying and listening to sounds of a shofar?! I decided to save the day by trying to weave the three main themes of Rosh HaShanah into my lecture on cosmology. And so I began… NASA/WMAP Science Team - Original version: NASA; modified by Cherkash In the Rosh HaShanah liturgy, we refer to this day as yom harat olam – the birthday of the world (Machzor Rosh HaShanah). According to modern cosmology, the world was born in an unfathomable explosion called the Big [...]

By Alexander Poltorak|2019-10-03T22:58:56-04:00September 9th, 2013|Cosmology, Holidays (Yomim Tovim), Kabbalah, Rosh HaShanah, Space, Uncategorized|2 Comments

Entangled Sisters

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