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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Shabbat
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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Yom Kippur—The Day of Pure Delight
Yom Kippur means “The Day of Atonement.” Some view it as a frightening day full of regrets of the past and anxiety for the future.
September 15, 2021 / 9 Tishri 5782
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Sanctuaries in Space and Time
We are quite familiar with space—we move freely in space back and forth; we concur space on land and beyond; we reclaim land from sea;
March 14, 2021 / 1 Nisan 5781
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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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Primordial Serpent—the Incurable Atomist
Now the Serpent was more cunning than any beast of the field which the Eternal G‑d had made. (Genesis 3:1) When G‑d placed Adam
February 14, 2020 / 19 Shevat 5780
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Why the first humans were not allowed to eat from the Tree of Knowledge
As always in science, every answered question breeds new questions. Now that we understand that the Tree of Life and the Tree of Knowledge are
December 26, 2019 / 28 Kislev 5780
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Ten Sephirot and Special Relativity
The Special Theory of Relativity, published by Albert Einstein in 1905, was a game changer. It ushered the era of new physics dubbed by some
June 2, 2019 / 28 Iyyar 5779
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Scientists are Clarifying Witnesses
Listen, O heavens, and I will speak! And let the earth hear the words of my mouth! (Deut. 32:1) In this Torah portion Haazinu, Moses
September 21, 2018 / 12 Tishri 5779
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Brit Milah in Six Dimensions
Sefer Yetzira speaks of three dimensions: Olam, Shanah, and Nefesh (Sefer Yetzirah, 6:4.) Olam means “world” and signifies space. Shanah means “year” and signifies the dimension of
September 18, 2018 / 9 Tishri 5779
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Sabbatical Year – when the Wavefunctions are Collapsed
The Torah portion, Re’eh, talks about the Sabbatical Year—in Hebrew, Shemitah—the Seventh year. When the Sabbatical year comes, all loans are forgiven, and Jewish servants
August 17, 2018 / 6 Elul 5778
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Tisha B’Av on Shabbat – A Relativistic Perspective
Yesterday was the 9th day of the month of Av or, in Hebrew, Tisha B’Av. Usually, Tisha B’Av is marked by mourning and fasting. Yesterday,
July 22, 2018 / 10 Av 5778
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Fractal Patterns in the Torah
In the Torah portion Emor (Leviticus 21:1–24:23), we are instructed to abstain from work every seventh day on Shabbat. Next week’s Torah portion, Behar, continues
May 31, 2016 / 23 Iyyar 5776
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Shabbat in Numbers
Last week Torah portion, Emor, speaks about the prohibition of working on Shabbat. In fact, the Talmud enumerates precisely 39 categories of labor forbidden on
May 22, 2016 / 14 Iyyar 5776
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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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Secrets of the Talking Ass
And G‑d opened the mouth of the ass, and she said to Bilam: “What have I done to you, that you have struck me these
July 6, 2014 / 8 Tammuz 5774
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Menorah
Speak unto Aaron, and say unto him: “When thou lightest the lamps, the seven lamps shall give light in front of the menorah.” (Num. 8:1)
June 8, 2014 / 10 Sivan 5774
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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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