Isaac and the Philistines
As in the days of Abraham, the land of Canaan experienced another drought and famine—and, having the example of his father before him, Isaac journeyed south with the probable intent of going into Egypt where food would be more likely available, that country being sustained by the annual inundation of the Nile. His journey took him to the southern Philistine city of Gerar, whose king bore the hereditary title Abimelech (meaning “Father King” or “My Father Is King”). That several kings bore the title of Abimelech is amply proven by archaeological discoveries.
Verse 2 records that God told Isaac, “Do not go down to Egypt; live in the land of which I shall tell you.” This implies that God generally directed Isaac’s movements, for if God had merely wanted Isaac to remain in Canaan, He would have simply said, “Live in the land,” omitting “of which I shall tell you.” The latter phrase implies continued guidance. This is interesting because we are told that Abraham, although going into Canaan, went “not knowing where he was going” (Hebrews 11:8 Hebrews 11:8By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing where he went.
American King James Version×), and that God had said, “Get out of your country…to a land that I will show you” (Genesis 12:1 Genesis 12:1Now the LORD had said to Abram, Get you out of your country, and from your kindred, and from your father's house, to a land that I will show you:
American King James Version×), implying that although Abraham knew he was heading toward Canaan, he did not know whether he would remain there or if God would lead him elsewhere. Isaac’s movement toward Egypt was stopped by God’s directly intervening to guide his movements within Canaan. For the moment, God gave no further direction than to remain in the land of Canaan (verse 3).
Notice also that in both Genesis 12 and 26 we have the repeated pattern of God commanding his servant (Abraham or Isaac, respectively) to go to a land that He would show him, followed immediately by a giving or reaffirming of what has come to be called the Abrahamic Covenant. Genesis contains several examples of this kind of couplet—as you read through the book, you should keep your eyes open for them. One of the couplets is Abraham and Isaac’s denial of their wives, in each case to a king titled Abimelech (Abraham also did so to Pharaoh, Genesis 12). These couplets have led some to suggest that the book of Genesis was stitched together from several different and contradictory traditions—in this case, one tradition having Abraham denying his wife, and another tradition having Isaac denying his wife. The truth is that there are no contradicting traditions. Abraham and Isaac both did the same things, the son imitating the father, perhaps for the same reasons.
Though the incidents with Abraham occurred before Isaac was born, Isaac probably heard about them, perhaps viewing such an approach as acceptable. In Isaac’s case, however, he did not have his father’s excuse that his wife actually was his sister. So this was blatantly a lie (although it could perhaps be argued that a close relative could be called a sister). In any case, this was clearly wrong and illustrates the fact that a bad example can go a long way.
Still, despite Isaac’s problems, he was a man who, like all of us, was growing in faith. Indeed, his is a tremendous example of perseverance. God greatly blessed him (Genesis 26:12-14 Genesis 26:12-14  Then Isaac sowed in that land, and received in the same year an hundred times: and the LORD blessed him.
 And the man waxed great, and went forward, and grew until he became very great:
 For he had possession of flocks, and possession of herds, and great store of servants: and the Philistines envied him.
American King James Version×). But enemies tried to thwart him, filling in wells that his father’s servants had dug. Isaac’s answer: dig new wells. When the same enemies then quarreled with him over a new well, he dug another well, and then another, and then another. Country singer Paul Overstreet actually wrote a song inspired by all of this called “Dig Another Well.” It talks about the devil thwarting our efforts—stopping up our wells—and then says, “When I go out for my morning drink, and get a dipper full of dirt, my heart does sink, but I think of old Ike and I have to grin—God blessed me once and He can do it again.” And the song’s advice to those facing such circumstances: “Just pick up your shovel, and dig another well.”