Yavdel Veyn: Divided Between
Ve Yavdel Elohim Veyn Ha-Awr Va-Veyn Ha-Hhoshekh
The letter 4/Dalet, archetype of resistance, makes its first appearance in Genesis in the word Yavdel. Rather than dividing between, Yavdel provides the last necessary ingredient for biological life -- resistance. This enables a controlled, organic action or movement in existence (30/Lammed), which acts among or is bestowed, on both the light (Awr, structured energy/consciousness) and the darkness (Hhoshekh, unstructured energy/consciousness).
Veyn-Va-Veyn (2-10-700 (6) 2-10-700), our "between," repeated twice, confers cosmic indetermination (700) on the existential containers (2-10) of both light and darkness; evolution, the goal of Elohim, is set in motion. This is the first appearance of Noun/Nun-final in Genesis. It announces the stake in the Great Game of Life played by the two partners Aleph and Yod -- cosmic freedom, or unlimited potential development.
Yavdel Veyn Ve-Veyn: 10-2-4-30 2-10-700 (6) 2-10-700: shows the existence of the containers (10-2) acquiring the resistance necessary for life; the containers of existence (2-10) (of both light and darkness) become indeterminate.
Dallet, of course, provides the necessary resistance for Adam to resist Aleph to the point of becoming Aleph and a projection of Elohim (experience is transformed and life becomes cosmically fruitful).
The second Dallet in Genesis is the end of Yom Echad.
See: Yom Shabat