Tag Archives: God’s Names

Secrets of Pi

This week’s conjoined Torah portions of Vayak’hel and Pekudei conclude the description of the Mishkan’s construction. The Haftarah for Pekudei is a passage from the seventh chapter of I Kings (the exact verses vary by community) describing King Solomon’s construction of the Jerusalem Temple. One of the most breathtaking structures standing in front of the Temple was the “Molten Sea”, a large bathtub for the kohanim to immerse in (as per Rashi and II Chronicles 4:6). The Tanakh describes that the bath was circular, sitting upon a base of twelve oxen statues, and had a total depth of five cubits, roughly ten feet. It held a volume of alpayim bat, “two thousand baths” of water (I Kings 7:26). In fact, the Hebrew bat (בת) is likely the etymology for the English word “bath”!

Illustration of the First Jerusalem Temple, or Solomon’s Temple, with the Molten Sea on the right.

What’s most perplexing in the description is that we are told the diameter of the circular tub was 10 cubits, yet its circumference was 30 cubits. Throughout history, many have pointed out that this seems to be an error! We all know that the ratio of a circle’s circumference to its diameter is π or Pi, which is 3.1415926 (and so on). So, the Tanakh should have said that the diameter was 10 cubits and the circumference was 31 or 31 and a half cubits. How do we solve this puzzle, and what deeper significance does Pi hold in the Torah?

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Do You Have Free Will?

Is everything predetermined or does a person have complete free will? Are we truly in control of our lives, or is it our spiritual and genetic predispositions? Find out in this class where we also discuss time travel and the “grandfather paradox”, nature vs. nurture, and if there is a “religion gene” that makes some people have more faith.

For more, see ‘Time, Gravity, and Free Will‘.
See also ‘Time Travel in the Torah‘. 

Origins and Mysteries of Shabbat Candles

1723 Illustration of Shabbat Candle-Lighting

This week’s parasha, Tetzave, begins with the command to take “pure olive oil, crushed for lighting, to kindle the lamps continually.” (Exodus 27:20) This refers to lighting the “eternal flame”, ner tamid, of the Temple Menorah. Since the destruction of the Temple, we are no longer able to fulfil this mitzvah exactly. However, the Sages say we can still fulfil this mitzvah through the lighting of Shabbat candles. The Ba’al HaTurim (Rabbi Yakov ben Asher, 1269-1343) presents some mathematical proof for this as well: the gematria of ner tamid (נר תמיד) is 704, equal to “on the Sabbath” (בשבת), while the gematria of tetzave (תצוה) is 501, equal to “[God] commanded the women” (נשים צוה). In other words, God commanded women to light Shabbat candles as a way to keep the Temple’s eternal flame going.

This beautiful teaching actually helps us pinpoint the origins of lighting Shabbat candles, since the mitzvah is not explicitly mentioned anywhere in the Torah. Where exactly did it come from, why was it instituted, and why is it women specifically that are instructed to light these candles? Continue reading