...contained in each one of them. Each one of the four levels – the musical notes, vowel signs, crowns and letters – contains the four root letters of the Name and the four expansions of AV, SaG, MaH and BaN. Thus each of these four levels extends as a complete array of ten Sefirot, which are contained in the four letters and four names we have mentioned.
The lights execute their functions through the holy names which make up the Torah.