Why does the Torah insert the word "Re'ei ... "?
Rashi: 'You can see with your own eyes! 1 I am not concocting it'.
Seforno: 'See, how the inhabitants of the land are too terrified of Yisrael to defend themselves.
What are the implications of "Bo'u u'Reshu es ha'Aretz"?
Rashi: It implies that the Cana'anim will all flee, and they will conquer the land without having to raise a sword. 1
Ramban: It implies that conquering Eretz Yisrael is (not a promise, but) a Mitzvah. 2
Having said "la'Avoseichem", why does the Torah add "le'Avraham, le'Yitzchak u'le'Ya'akov"?