The land you are crossing the Jordan to take possession of is a land of mountains and valleys that drinks rain from heaven. It is a land the LORD your God cares for; the eyes of the LORD your God are continually on it from the beginning of the year to its end (Deuteronomy 11:11-12).

During our five weeks in Israel in late June and July, not once did it rain. 

In fact, almost six months go by each year without any rain, between May and October. 

In all of the Middle East, water has always been precious — like oil is nowadays.

In ancient times, countries that had water in abundance became superpowers. Countries with little water barely survived. 

Egypt received almost no rain at all, but had abundant water from the flooding of the Nile.

That was why when regional famines came, people went to Egypt to purchase food — like Abraham and later Joseph's family. 

The water available from the Nile each year was 30,000 times more plentiful than the yearly rainfall to Israel — an enormous difference indeed! 

It is therefore interesting that God saw the water of Israel as superior to that of Egypt:

The land you are entering to take over is not like the land of Egypt, from which you have come, where you planted your seed and irrigated it by foot as in a vegetable garden. But the land you are crossing the Jordan to take possession of is a land of mountains and valleys that drinks rain from heaven. It is a land the LORD your God cares for; the eyes of the LORD your God are continually on it from the beginning of the year to its end
 
(Deuteronomy 11:10-12).

The difference between Egypt and Canaan was that in Egypt the crops were irrigated by the labor of hand-watering, while in Canaan the land was entirely watered by rain, geshem in Hebrew. 

In the ancient Middle East, that had profound spiritual implications, because rain was understood to be a gift straight from God, whereas water drawn by hand was a seen to be human self-reliance without regard to God. 

Egypt and Canaan, therefore, were a contrast of security of human effort compared to dependence on God.