Koichos
Pro
This is ranging into an area that I am uncomfortable entering on a public forum, but I will say this: the mystical account of Creation in the holy Zohar (an esoteric commentary on the Torah, with an emphasis on mystical and spiritual matters) begins with the סוֹף אֵין ʾEin Sof ('Infinite One')—who encompassed the totality of everything prior to Creation—contracting within Himself and drawing His אוֹר ʾor ('Light') within His חֹשֶׁךְ hoshach ('Darkness'), as it is written (Baréshıth 1:4): וַיַּבְדֵּל אֱלֹקִים בֵּין הָאוֹר וּבֵין הַחֹשֶׁךְ 'ʾAlohim separated the Light from the Darkness', and also, in the words of Sh'lomoh (Malochim ʾAlaf 8:12 and Div'ré Hayyomim Béth 6:1): יְיָ אָמַר לִשְׁכֹּן בָּעֲרָפֶל 'Hashém declared that He would live within the opaque Darkness'; however, at the boundary between the אוֹר ʾor ('Light') and the חֹשֶׁךְ hoshach ('Darkness'), there was a 'mingling' of the two—and it was from this mixture that the Deity fashioned the Earth and all the physical matter in the Universe.Ein Sof - Wikipedia
indeed
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Nu (mythology) - Wikipedia
"I raised them up from out of the watery mass [nu], out of inactivity [nen]"
The ʾEin Sof, in His desire to interact with the physical universe, emitted ten 'safiroth' (a word that is impossible to translate, although it is normally interpreted to mean 'spheres' or 'emanations', but literally means 'counting' or 'enumerations'). The ten 'safiroth' are not, however, supposed to be 'parts' of the Deity as can readily be seen from the abstract nature of their various names: kathar ('crown'), hochmoh ('wisdom'), binoh ('understanding'), hasadh ('kindness'), gavuroh ('might'), tifʾarath ('beauty'), nassah ('eternity'), hodh ('splendor'), yasodh ('foundation'), malchuth ('sovereignty'). The entire concept of the 'safiroth' is really just an attempt to square the circle and explain the unexplainable: the 'nature' of God Himself. The account of Creation as given in Jewish esoteric tradition is rather complex and likely to lead to a torrent of questions which will be even more difficult to answer without delving ever deeper into abstruse matters and other flights of fancy.