Moshe describes the desolation of the Land of Israel which will be a result of the failure to heed Hashem's mitzvos. Both their descendants and foreigners alike will remark on the singular desolation of the Land and its apparent inability to be sown or to produce crops. Moshe promises, however, that the people will eventually repent after both the blessings and the curses have been fulfilled. However assimilated they will have become among the nations, eventually Hashem will bring them back to Eretz Yisrael. The Parsha concludes with a dramatic choice between life and death.
Moshe exhorts the people to choose life.
Man is set between the animals and the angels. If he fills his life with vanity and the empty frenetic rush to fulfill his own desires, then he falls to the level of an animal. On the other hand if he conquers his negative instincts, and he sanctifies and purifies his thoughts, words and actions, Man raises himself to the level of an angel. Really, however, he has raised himself higher, for angels have no negative drives to overcome, and so Man's ascent is so much the greater. Ki Savo, they were devastated and questioned whether they could possibly survive such terrible punishments.