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Generally we assume that God is omnipotent, and could have created the world in a single day\act, so He must have had a reason to organize creation into 7 days. Why?

In other words:

  1. Why didn't God create the world in one big act of creation?
  2. Why did God choose to create the world in 7 days, as opposed to any other number? (Probably related to this question.)
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I assume there are midrashim and mefarshim that answer this question. – Shmuel May 19 '13 at 3:00
re "I assume there are midrashim and mefarshim that answer this question": That is neither a prerequisite for asking a question here nor a reason that a question should be an acceptable one. – Double AA May 19 '13 at 4:46
chabad.org/media/pdf/287/oWdQ2875261.pdf -- Avot 5:1 – Menachem May 19 '13 at 4:59
Nice +1 This is much better than your original post and is more likely to attract the answer you are looking for. – Double AA May 19 '13 at 6:18
@Menachem - OK, good start. – Shmuel May 19 '13 at 6:39
up vote 1 down vote accepted

there are many answers as to why not in one saying. here's one possible answer: "By ten divine sayings the world was created. Could it not have been created by one? What does this teach us? In order to emphasize the guilt of the wicked who destroy the world that was created with ten sayings and the merit of the righteous who preserve the world that was created with ten sayings." avos ch.5 (i.e. to give the righteous more reward since they are sustaining a world created with more "work")

The ten divine sayings correspond to the ten sefirot in kabala.

As for why specifically seven days, see this: http://www.dafyomi.co.il/parsha/breisht3.htm

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Wouldn't those statements be stronger if the world were created with, say, 100 sayings? – Double AA May 19 '13 at 8:26
the second part of the answer provides the reason why 6 days – Gizbar May 19 '13 at 10:02

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