Five-Hundred-Year-Journey
Alexander Poltorak Abstract This essay addresses the anigmatic statement of the Jewish Sages, stating that G-d created this world with the letter Heh and the
August 11, 2025 / 17 Av 5785
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G‑d
Shemini,Phase Space,Hamiltonian Mechanics: Kabbalah and Physics of Seven and Eight
By Alexander Poltorak Abstract The Torah portion of Shemini records the climactic eighth day of the Tabernacle’s dedication, the moment when divine fire finally descends.
April 28, 2025 / 30 Nisan 5785
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The Soul – Part IV. The Whole vs. the Parts
This is the fourth installment in the series of essays on the nature of the soul. The first three installments can be found here: What
December 27, 2021 / 23 Tevet 5782
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What is a Soul? III. The Many Souls of Man
…[H]e who tries to cure the soul, wishing to improve the moral qualities, must have a knowledge of the soul in its totality and
December 15, 2021 / 11 Tevet 5782
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What Is a Soul? II. Anatomy of the Soul
In the biblical story of the creation of Adam, the Torah states: Then the Eternal G‑d formed man of the dust of the ground, and
November 5, 2021 / 1 Kislev 5782
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The Cosmological Problem of Initial Conditions and the Universe of Tohu
Now the earth was unformed and void. Genesis 1:2 We have a big problem in cosmology: the problem of the initial conditions of the universe at
September 30, 2021 / 24 Tishri 5782
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Physics of Tzimtzum II — Collapse of the Wave Function
In the previous post “Physics of Tzimtzum I—The Quantum Leap”, we gave a general overview of the mystical doctrine of tzimtzum—the cornerstone of Lurianic Kabbalah.
September 11, 2020 / 22 Elul 5780
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Physics of Tzimtzum I — The Quantum Leap
Introduction “In the beginning G‑d created the heavens and the earth.” (Genesis 1:1) “In the beginning G‑d created the heavens and the earth,” the Torah
August 17, 2020 / 27 Av 5780
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My Name Is G‑d, and I Am Pleased to Make Your Acquaintance
In the beginning, G‑d created the heaven and the earth…[1] (Genesis 1:1) Classical biblical commentators have given the first words of the Torah many
May 25, 2020 / 2 Sivan 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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Sensing Spirituality
It is unsurprising, then, that spiritual phenomena have never been experimentally detected in a laboratory setting. Spirituality, by definition, is non-physical. Consequently, no physical laboratory
December 25, 2013 / 22 Tevet 5774
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