1)
What is the significance of the double expression "mi'Sham Yekabetzcha Hashem Elokecha u'mi'Sham Yikachecha"?
1.
Targum Yonasan: 'From there He will gather you via Eliyahu ha'Navi, and from there He will take you via King Mashi'ach.
2)
Why is the meaning of "Im Yih'yeh Nidachacha bi'Ketzei ha'Shamayim"?
1.
Rashi (in Nechemyah, 1:8-9), Targum Onkelos and Targum Yonasan: It means, no matter how far away the exiles are, Hashem will gather them in.
2.
Lev Eliyahu (Sh'mos p.193): It means even if one is very distanced from Hashem, he still holds onto the edge of the heaven - there is a weak spark still left in him.
