The Akeidat Yitzchak (The Binding of Isaac) awakens eternal merit for Klal Yisrael. Indeed, the Shofar that we sound on Rosh HaShanah evokes the remembrance of the Akeidah, which took place on Rosh HaShanah. The Torah reveals the secret of the Akeidah: "I will bow down toward Your holy Temple." Yitzchak "bowed down," i.e., accepted, HaShem's judgment requiring him to give his life as a sacrifice to HaShem. Even more, he trusted that the judgment was holy, as the verse says, "I will bow down towards Your holy temple." His great faith in the truth of HaShem's decree awakened the divine attribute of mercy. As a result, HaShem rescinded His ruling for Yitzchak to give up his life. Yitzchak's recognition of the truth of the judgment is the reason for the awesome merit of the Akeidat Yitzchak. The Shofar that we sound on Rosh HaShanah symbolizes the horn of the lamb that Avraham sacrificed in place of Yitzchak. When we blow the Shofar, it awakens the merit of the Akeidah. Specifically, HaShem's wondrous mercy that was stimulated by Yitzchak Avinu accepting his fate as a divine judgment of HaShem.
The sounding of the Shofar inspires us to accept the judgment of HaShem on Rosh HaShanah. As a result, HaShem awakens His mercy upon us on two accounts. Firstly, on the merit of the Akeidah of Yitzchak Avinu. Secondly, on our acceptance of the holy judgment of HaShem.
When you hear the sound of the Shofar on Rosh HaShanah, remember the Akeidat Yitzchak. Accept the judgments of HaShem, just as Yitzchak Avinu did thousands of years ago on Rosh HaShanah. Trust that HaShem will have mercy upon you, Klal Yisrael, and the entire world.
(Based on Tomer Devorah, Chapter Five)