What is "Nishpo"?
Rashi: It is darkness of night.
Ibn Ezra: It is the start of the night and the end of the night. Malbim - Kochevei Neshef are stars that illuminate at the start of the night, after sunset.
What is "Af'apei Shachar"?
Rashi: It is radiance of morning, like "v'Af'apenu Yizelu Mayim 1 ."
Ibn Ezra: Some say that it is overseeing, like "ha'Sa'if Einecha Bo v'Einenu." This is wrong.
Ibn Ezra: It is a Mashal. Morning is compared to eyes, which have black (pupils).
Malbim: This is a Mashal. Night yearns to see light of morning; morning will not enable night's eyes to see the light, for the morning will not illuminate.
I do not understand this. Indeed, here the word implies radiance, but there it refers to the eyelids or pupils! (PF)
What is the significance of his curses of night?
Devar Eliyahu: There are 10 curses, just like there are 10 components of night - seven like the day, and another three - Erev, Boker 1 and both of them together - "va'Yhi Erev va'Yhi Boker Yom Echad." So Iyov had seven sons and three daughters. The first three curses correspond to three Oros - "Yehi Ohr", "va'Yhi Ohr", "va'Yar Elokim Es ha'Ohr Ki Tov." Corresponding to them, Hashem made three luminaries - sun, moon and stars.
Malbim: After he cursed day by itself, and night by itself, he cursed evening and daybreak, where day and night join at the start and end of the night.
Perhaps Boker is Ashmores ha'Boker, the last Mishmar of the night. (PF)
