Nefesh HaChayim, Reb Itzele's Long Annotation

And he invents:An internal [aspects of the] model, so that by using it the internal aspects of the vessel could be made employing the media458Heb.: beit keebool—literally “receptacle” that he desires; and alsoAn external model that encompasses the external aspects459Heb.: dahf-nei of the vessel, to delimit the external aspects in their thickness and dimensions according to his will. And the two of them are like one: a single tzellem and model. It’s just that this enters into the interior of the vessel to make its interior space according to the correct dimensions; and the other encompasses and surrounds to set its exterior to the correct dimensions.[*] In this way (metaphorically) when the Creator (blessed be His name) desired to create man from dust, which is the vessel that is employed according to His (blessed be His name) will, He first involved tzellem and model, out of which that it would be possible to make the person’s d’moot in body and limbs/organs, so that using them he could perform specific actions according to His (blessed be He) will. And He created four roots from which he brought into existence the spiritual internal and encompassing tzellem.