Infinite mercy and kindness, adds onto her as needed, so that she can accommodate an increase of Jewish inhabitants. Based on this, the Tiferes YehoNasan proposes the following novel concept: The portion of Eretz Yisrael related to its natural size and boundaries is considered an inheritance from the holy Avos. On the other hand, the portion HKB”H adds extravagantly as needed, is considered a gift from HKB”H.
Furthermore, he asserts that the portions HKB”H adds to increase the size of Eretz Yisrael to accommodate an increase in Jewish inhabitants are given solely in the merit of the labor in the study of Torah she’b’al peh. Let us explain. HKB”H gave us Torah she’b’chsav; all the mitzvos are taught in it; they cannot be added to or diminished. On the other hand, he gave the sages of Torah she’b’al peh permission to expound on the tips of every letter copious halachos based on the thirteen hermeneutic principles. In this manner, the Torah expands becoming greater and more glorious chock full of halachos that have been clarified in Torah she’b’al peh.
Similarly, HKB”H gave them the unique power (Vayikra 18, 30): "ושמרתם את משמרתי"—you shall safeguard My charge. The sages expounded (Yevamos 21a): "עשו משמרת למשמרתי"—institute decrees and restrictions to safeguard Torah observance and compliance. Therefore, corresponding to Torah she’b’chsav which is set and immutable, HKB”H gave Eretz Yisrael to Yisrael as an inheritance according to its natural size and dimensions, which are fixed and unchanging. However, corresponding to Torah she’b’al peh which is constantly expanding and enhancing the scope of the Torah and mitzvos, HKB”H gave Eretz Yisrael to Yisrael as a gift with additions in excess of its defined territory.
We can now comprehend the chiddush of the Rogatchover Gaon, ztz”l, to a greater degree. HKB”H instructed Moshe Rabeinu to ascend to the top of the cliff “and see with your eyes”—to view all of Eretz Yisrael with his generous gaze to impart to the land the power of “pilpul” (related to Torah-study) that HKB”H granted him exclusively. He graciously shared this incredible tool with Yisrael; for, only with this powerful Torah-related tool would Yisrael merit entering Eretz Yisrael and would the land possess the capacity to be Eretz Tzvi—a land, like the hide of a deer, that can expand to accommodate the number of Bnei Yisrael inhabiting it.
Accordingly, we can explain a statement in the Midrash beautifully (Yalkut Shimoni, Yeshayah 60, 503): "עתידה ירושלים להיות כארץ ישראל וארץ ישראל ככל העולם"—Yerushalayim is destined to be like the entirety of Eretz Yisrael, and Eretz Yisrael will be like the entire world. We can propose the following: Le’asid la’vo, when the dead are resurrected, all the generations of Jewish neshamos will rise from the dead and will return to Eretz Yisrael. That being the case, it will be necessary for Eretz Yisrael to expand in order to accommodate them comfortably.
Now, we find the following prophecy with regards to the future geulah (Yeshayah 51, 4): "כי תורה מאתי תצא"—for Torah will come forth from Me.” The sages expounded on this passuk in the Midrash (V.R. 13, 3): HKB”H said: “A new Torah will come forth from Me; novel interpretations of the Torah will come forth from me.” This implies that le’asid la’vo, there will be new revelations in Torah she’b’al peh that have never been heard before. In the merit of these revelations Yerushalayim and Eretz Yisrael will expand and encompass the entire world. This should come to pass swiftly, in our times! Amen.