אֶֽת־הַבְּרָכָ֑ה אֲשֶׁ֣ר תִּשְׁמְע֗וּ אֶל־מִצְוֺת֙ יְהוָ֣ה אֱלֹֽהֵיכֶ֔ם אֲשֶׁ֧ר אָנֹכִ֛י מְצַוֶּ֥ה אֶתְכֶ֖ם הַיּֽוֹם׃
너희가 만일 내가 오늘날 너희에게 명하는 너희 하나님 여호와의 명령을 들으면 복이 될 것이요
Rashi on Deuteronomy
את הברכה [I SET BEFORE YOU] THE BLESSING — with the condition that you should obey (אשר תשמעו).
Or HaChaim on Deuteronomy
את הברכה אשר תשמעון, "The blessing if you will hearken, etc." The word את which frequently means "with" means here that in addition to the blessing which is the result of walking in G'd's paths there would be a bonus, i.e. they would hearken to G'd's commandments. Hearkening to G'd's commandments is perceived as a pleasurable experience by itself. It helps the soul to feel "alive" as we know from Isaiah 55,4: שמעו ותהי נפשכם, "hearken and your souls will come alive." Whenever someone who studies Torah gains an understanding of what the Torah has in mind he experiences a physical and spiritual sense of wellbeing. He owes G'd a debt of gratitude for affording him such pleasure. There is no need to add that such a person cannot demand a reward from G'd for having allowed him to experience such joy.
Rashbam on Deuteronomy
את הברכה, which would be on Mount Gerizim on condition that 'אשר תשמעו אל מצות ה', וגו, that you will listen, etc.