Why does it say "v'Es Kol Eleh Yadi Asasah"?
Rashi: Shamayim and Eretz - My hand did this. I constricted My Shechinah amidst you when you heeded Me.
Radak: Do not think that because I said "ha'Shamayim Kis'i veha'Aretz Hadom Raglai", that they always existed, like Me. No! Only I am Kadmon; I made all these - Shamayim and all its legions, the land and all that is on it.
Malbim: To request from His creations to build a house for Him to dwell in, this 'shows' that they fulfill His lack. This cannot be, for "I made all these..."
Why does it add "va'Yihyu Kol Eleh"?
Radak: I made them, and they were like I commanded.
Malbim: Both the initial formation, and also the continued existence, is only from My hand.
Is "v'El Zeh Abit..." connected to the beginning of the verse?
Rashi: Yes. I constricted My Shechinah amidst you when you heeded Me, because it is My conduct to look at the poor, broken spirited and diligent [to fulfill] My word.
Radak: Yes. Even though I am exalted over all exalted beings (I made them), I look at the lowly, humble and diligent about My word to fulfill My Mitzvos.
What is the significance of "Oni u'Nche Ru'ach v'Chared Al Devari"?
Malbim: He is externally poor, and internally, his spirit is broken (he is humble), and even so, he is zealous to heed My voice. This is the purpose of the Mikdash and Korbanos - a pleasant spirit that I said, and My desire was done. The Korban is not what is desired, rather, fulfilling My desire and submissiveness that man shows to Me via heeding My word.