Besides the seven-fold repetition of the verb, which implies a complete return of both parties, the root Sh. This shows how chapter 30 is integrally bound with these parts of Deuteronomy. In several places the language of Deuteronomy 30 exactly parallels or reverses the language of the Deuteronomy 28. The use of the same language indicates that the return is to the former state, nullifying the effects of the curses completely. This expansion gives greater detail about the process of teshubah and the response of God.
Hope comes from finding meaning in the suffering.
The idea of these verses is that the suffering of history was meant for Israel to improve by taking the events to heart. This would elicit a response by God which would engender further growth of the Israelites. The former way shows how the prophetic leader, Moshe, is very aware of the nature of his people. The second way shows a leader concerned that his people should survive even the worst catastrophe and continue to grow. Shadal argues convincingly for the root Sh.