John Chrysostom
The essence from which the creature emerges is referred to as milk that is drawn out, and just as milk can transform into cheese, so too the essence that is poured out and solidified becomes natural (φυσις); this represents the initial stage of the embryo. The seed, once it has been nurtured in the womb and has thickened like cheese, develops into a natural form; it then takes shape, or as Scripture articulates, ‘represented’ (εξεικονιζεται) (Ex. 21:22-23), and takes on a semblance; the fluid essence solidifies and is differentiated within the womb into skin, flesh, bones, and sinews. Each of these distinct components, once a soul animates them, possess life; however, once the soul departs, they remain inert.
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“And not only gave me life,” indicating the act of creation itself, “but also wrought favour with me,” referring to divine grace; “throughout my life I have enjoyed Thy providence.” This reflects the sentiment of the words, “Thy care hath kept my spirit” (“Thy visitation... Thou hast kept my spirit”), signifying that “even after coming into being, I continue to experience life through Thy providence.” In summary, the preceding and following statements illustrate the entire process and unity of the physical formation.