Be-REiShYT (In-the-beginning) can be read as two words: BaRA (He-created) ShYT (six). And what are they? Six chambers. [corresponding to the six days of creation], ELQYM – Higher Mother – is above them, for She is the seventh chamber.
And just as Higher Mother produces six, so does Lower Mother produce six. And what are they? (Gen. 1:1)... the heavens and the earth. And they are six vessels of which it is stated: (Ex. 20:11) For in six days did Y”Y make the heavens and the earth... And the lower chambers are vessels for the higher chambers.