1)
What is the significance of blessing Hashem "Min Alma v'Ad Alma"?
1.
Malbim: He is the source and root of everything. All exists as long as He wants it to exist.
2)
What do we learn from "Di Chochmesa u'Gvursa Di Le Hu"?
1.
Ibn Ezra: All Chochmah and Gevurah is only His. All creations above and below are like Mikreh 1 ; they are from Him.
2.
Malbim: Chochmah and ability are not additional characteristics of Him. Rather, He Himself is Chochmah and Gevurah. All Chochmah and Gevurah are influence from Him.
1
I.e. their existence is not essential. (PF)


