Gra

Also, ancient Hebrew mystics, when looking for an alternative to the tetractys of Pythagoras, stumbled upon the hypercube at antipode position for their "tree of life" diagram. Here, we see that each corner, or node, of the tree describes an attribute of YHVH, and that the twenty-two "paths" connecting these "sefirot" emanations are assigned to the twenty-two letters of the Hebrew alef-bet. This arrangement is called the Gra.