What are the implications of "Lo k'Eretz Mitzrayim Hi"?
Ramban and Rashbam: It implies that Eretz Yisrael is not like Eretz Mitzrayim, which is governed by the laws of nature, 3 but better than it - if we keep the Mitzvos, and worse than it - if we don't (because, unlike Egypt, 4 it relies on rain for its water-supply all year round, and if we fail to keep the Mitzvos, Hashem will withhold rain and nothing will grow - Ramban). 5
Da'as Zekenim, Hadar Zekenim, Rosh: Egypt is flat, so one can make [channels for] water to flow to his fields, like is done for a vegetable garden seeded by a river. Eretz Yisrael has mountains and valleys. One cannot irrigate it. It needs Hashem's rain. Be careful with His Mitzvos, so He will send down rain for you in its time!
Rosh: Eretz Yisrael drinks from the clouds, which get the higher water. Eretz Yisrael drinks rain, and the rest of the world, Mei Tamtzis (what drips from Eretz Yisrael). Hashem Himself waters Eretz Yisrael, and and the rest of the world,through a Shali'ach
Notwithstanding Pasuk 11:11, which discusses when Yisrael observe the Mitzvos and Hashem rewards them (See the explanation of Mosad ha'Rav Kook) and refer to 11:10:1:2.
Rashbam: Where a successful harvest depends on whether one irrigates the land or not.
Ramban: With its water-canals and pools.
Ramban: As the Torah explains - in Pesukim 13-17 - that if you obey the Mitzvos Hashem will send rain in its time, but if you don't, He will shut down the Heavens and there will be no rain, and you will perish quickly from the good land, because one cannot live there without rain. Refer also to 11:11:2:2*.
What difference does it make if Eretz Yisrael is mountainous land? Even if it wasn't, Hashem would have no difficulty is drying up the water supply in the event that they sinned?
Ramban: Hashem runs the world according to the laws of nature, and it is therefore far more natural to withhold rain than to dry up water that is already there. 1
Refer to 11:10:1:3.
Ramban: As the Gemara says in Shabbos, 32a, 'A sick person requires more merits and Tefilah for Hashem to heal him, than a healthy person needs not to become sick'. And the same distinction applies to poverty and riches.
From where do we know that Eretz Yisrael is intrinsically better than Eretz Mitzrayim?
Rashi (citing Kesuvos, 112a): When the Torah writes (Bamidbar, 13:22) "v'Chevron Sheva Shanim Nivnesah lifnei Tzo'an Mitzrayim", 1 it means that it was seven times better than Tzo'an of Egypt 2 - despite the fact that Tzo'an housed the throne of kings.
Why does the Torah add the words "Asher Yetzasem mi'Sham"?
What are the connotations of "v'Hishkisa b'Raglecha"?
Rashi: In Egypt, you needed to fetch water from the Nile on foot and to water the land required stealing from your sleep, and much toil. Moreover, the initial watering covered only the lower ground; to water higher ground entailed carrying water up the hill. But in Eretz Yisrael, the land is watered by the rain from the heavens - you will sleep in your beds, and Hakadosh-Baruch-Hu will water the land, both the lowland and the high ground, land that is revealed and land that is hidden (all at one and the same time)!
Why does the Torah add "k'Gan ha'Yarak"?
Rashi: Because a vegetable garden cannot be watered by rain, only on foot, by carrying buckets of water on one's shoulders.