This poster shows the three primary Hebrew letters - the Three Mothers of Sefer Yetzirah, an ancient text of meditative Kabbalah. In the triangle is a red Shin.
Shin, a vertical letter with a hissing sound, represents Fire and is associated with our head. In the rectangle is a blue Mem.
Mem, a horizontal letter with a humming sound, represents Water and is associated with our belly. Shin and Mem are thus two polar opposites, the yin-yang of the Kabbalah.

In the circle is an Aleph, a silent letter that represents Breath, and is associated with our chest.
Breath, which is not cold like Water and not hot like Fire, moves Air in and out of our bodies. The yellow diagonal part of this circular Aleph balances between the blue part with horizontal lines (representing the inhale) and the red part with vertical lines (representing the exhale).

Hebrew letters are also numbers. This is called gematria. The word gematria is very similar to the word geometry.

Thus these letters represent three primary geometric shapes. The simple gematria of Shin is three - like the three sides of a triangle. The simple gematria of Mem is four - like the four sides of a rectangle.

The gematria of Aleph is one. Notice how the yellow diagonal of the Aleph is the diameter of a circle. In geometry, the ratio between the diameter of a circle and its circumference is pi - a mystical, endless number with no repeating pattern. The first three digits of pi are 3 (like the triangular Shin) 1 (like the circular Aleph) and 4 (like the rectangular Mem)!

Size - 21 x 28 cm (8.5 x 11 inches) Price - $10 (including shipping & handling)