Principle of Least Action III — History
The spectacle of the universe becomes so much the grander, so much more beautiful, the worthier of its Author, when one knows that a small
September 10, 2023 / 24 Elul 5783
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tzimtzum
Tzimtzum III—Renormalization—Sweeping Infinites Under the Rug
Sweeping Infinities Under the Rug—or Renormalization Having dealt with internal contradictions in the previous section (see Physics of Tzimtzum I — The Quantum Leap and
October 14, 2020 / 26 Tishri 5781
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Nobel Prize for Research on Black Holes
Congratulations to Roger Penrose, Reinhard Genzel, and Andrea Ghez for wining the 2020 Nobel Prize in Physics for their contributions to establishing the existence of
October 6, 2020 / 18 Tishri 5781
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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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On Tzimtzum, Sefirot and Cardinal Numbers
Today is Yud Tes Kislev — Rosh HaShanah of Chasidut. Today I received two gifts, which I’d like to share. Lately, while learning Samach Vov,
December 11, 2014 / 19 Kislev 5775
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Mezuzah in Three Dimensions
The mezuzah is one of the few miẓvot ([divine] “commandments”) for which the Torah states its reward. In this case, the reward is a long
August 15, 2014 / 19 Av 5774
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I Am Who I Am: Conversation at the Burning Bush
…And behold, the thorn bush was burning with fire, but the thorn bush was not being consumed.” (Ex. 3:2) Every theologian worth his salt along
December 23, 2013 / 20 Tevet 5774
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