Rabbi Benayahu Shmueli, Head of the Yeshiva: The Last Shabbat of the Year
Why, for example, on Rosh Hashanah do we not eat sour foods? One of the reasons—we want a person to have a sweet year, but another reason is—when a person eats something he is not used to, something sour, he grimaces his face; he makes a... a contortion. So it is said: this... this will be the image of the entire year afterward. We don't want him to have a pose... you know, catch him in a pose, take a picture of him while he is grimacing his face, and then he will have that all year. This is by way of an allusion, right? But—it is the truth!

Why, for example, on Rosh Hashanah do we not eat sour foods? One of the reasons—we want a person to have a sweet year, but another reason is—when a person eats something he is not used to, something sour, he grimaces his face; he makes a... a contortion. So it is said: this... this will be the image of the entire year afterward. We don't want him to have a pose... you know, catch him in a pose, take a picture of him while he is grimacing his face, and then he will have that all year. This is by way of an allusion, right? But—it is the truth!
"You are standing today, all of you"—the way you work [on yourself], that is how you will look! And now, everything follows the seal [the end]. This Shabbat elevates all the Shabbats [of the year]. A person needs to be in a special protective greenhouse during this Shabbat. How he guards himself, how meticulous he is with the laws of Shabbat, how he is all fire the entire Shabbat, a burning flame in the service of Hashem—and how he does this—makes a great noise in Heaven!
Why? In the month of Elul, the Ben Ish Chai writes to a person, telling him: Know that every hour is like a month. You know, every Shabbat... every hour on Shabbat is like 1,000 weekday hours. This is the Zohar, this is the Ben Ish Chai, this is the whole world. It is simple!
So imagine now in Elul, a Shabbat of Elul, and the very last Shabbat of the year—how its power is multiplied over and over again! Therefore, we must strongly utilize this Shabbat.