תֶּטְרָגְרַמְמָטוֹן · Tetractys

יהוה

four letters. ten appearances.
four rows of descent from Fire to Earth.
the gematria sums to seventy-two: the number of the Explicit Name.

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Yod Fire · Atziluth · Chokmah
the first spark, father, beginning י = 10

I 10

Yod the same spark, entering the second row י = 10

First Heh Water · Beriah · Binah
mother, the womb of understanding ה = 5

II 15

Yod the same spark, in the third row י = 10

First Heh the mother descends with the spark ה = 5

Vav Air · Yetzirah · Tiferet
the link, the axis, the son ו = 6

III 21

Yod the same spark, having reached the earth י = 10

First Heh the mother in the manifest world ה = 5

Vav the son who joins the mother and the daughter ו = 6

Second Heh Earth · Assiah · Malkuth
the daughter, the manifest world ה = 5

IV 26

10 + 15 + 21 + 26 =

— the Explicit Name · Shem ha-Mephorash —

The gematria of the tetractys sums to 72. The same number of angelic names is drawn out of Exodus 14:19–21 — three verses of exactly 72 letters each. The triangle contains within itself all seventy-two appearances of the Name.