Jeremiah 2:13

The Israelites had committed two evils: one a sin of omission, and the other a sin of commission. They had forsaken Yahweh who, like a fountain, had provided for their deepest needs (cf. Psalms 36:9; John 4:10-14; Revelation 21:6). And they had pursued idols who, like broken cisterns, could not even hold water-much less provide it. The most reliable source of water in Israel was a natural spring, and the least reliable was a cistern.

"The best cisterns, even those in solid rock, are strangely liable to crack, and are a most unreliable source of supply of that absolutely indispensable article, water; and if, by constant care, they are made to hold, yet the water, collected from clay roofs or from marly soil, has the color of weak soapsuds, the taste of the earth or the stable, is full of worms, and in the hour of greatest need it utterly fails. Who but a fool positive, or one gone mad in love of filth, would exchange the sweet, wholesome stream of a living fountain for such an uncertain compound of nastiness and vermin!" [Note: W. H. Thomson, The Land and the Book, 1:443.]