Sforno on Deuteronomy 29:11/ספורנו על דברים כ״ט:י״א

1לעברך בברית, you are all arranged in this order in order to signal your acceptance of the forthcoming covenant. It is clear from Moses’ addressing all the assembled, that they were of one mind at the time, all willing and eager to accept the covenant.

2'אשר ה' אלוקיך כורת עמך היום, למען הקים אותך וגו, G’d’s objective in concluding this covenant with you this day is to reaffirm that you are His people and that He is your G’d. By entering into this covenant with Him you acquire eternal life, life beyond the death of your bodies. Seeing that the purpose of the covenant is of such importance, is of so elevated a nature, it is necessary that you embrace it wholeheartedly.