וְלִמְשֹׁל֙ בַּיּ֣וֹם וּבַלַּ֔יְלָה וּֽלֲהַבְדִּ֔יל בֵּ֥ין הָא֖וֹר וּבֵ֣ין הַחֹ֑שֶׁךְ וַיַּ֥רְא אֱלֹהִ֖ים כִּי־טֽוֹב׃
Und am Tage und in der Nacht zu herrschen und zwischen dem Licht und der Finsternis zu scheiden; und Gott sah, dass es gut war.
Contemporary Halakhic Problems, Vol VI
R. Isaac Abarbanel encapsulates this insight in a brief but insightful comment on the verse that declares, "God beheld the universe and it was good" (Genesis 1:18). If one may be so bold as to employ anthropomorphic language in paraphrasing Abarbanel: God looked at His handiwork and exclaimed "Eureka! It works!" Everything in creation fits together like the pieces of a cosmic jigsaw puzzle. If those components did not fit together precisely in the way they do, there would not be a universe. Thus, Judaism's fixation upon celestial matters, as I called it, is actually a fixation upon God as the bore olam—as the Creator of the universe.