Philo interprets the story as follows:Now there was a famine in the land—besides the previous famine in Abraham’s time—and Isaac went to Abimelek king of the Philistines in Gerar. 2 The Lord appeared to Isaac and said, “Do not go down to Egypt; live in the land where I tell you to live. 3 Stay in this land for a while, and I will be with you and will bless you. For to you and your descendants I will give all these lands and will confirm the oath I swore to your father Abraham. 4 I will make your descendants as numerous as the stars in the sky and will give them all these lands, and through your offspring all nations on earth will be blessed, 5 because Abraham obeyed me and did everything I required of him, keeping my commands, my decrees and my instructions.” 6 So Isaac stayed in Gerar. 7 When the men of that place asked him about his wife, he said, “She is my sister,” because he was afraid to say, “She is my wife.” He thought, “The men of this place might kill me on account of Rebekah, because she is beautiful.” 8 When Isaac had been there a long time, Abimelek king of the Philistines looked down from a window and saw Isaac caressing his wife Rebekah. 9 So Abimelek summoned Isaac and said, “She is really your wife! Why did you say, ‘She is my sister’?” Isaac answered him, “Because I thought I might lose my life on account of her.” 10 Then Abimelek said, “What is this you have done to us? One of the men might well have slept with your wife, and you would have brought guilt upon us.” 11 So Abimelek gave orders to all the people: “Anyone who harms this man or his wife shall surely be put to death.” 12 Isaac planted crops in that land and the same year reaped a hundredfold, because the Lord blessed him. 13 The man became rich, and his wealth continued to grow until he became very wealthy. 14 He had so many flocks and herds and servants that the Philistines envied him. 15 So all the wells that his father’s servants had dug in the time of his father Abraham, the Philistines stopped up, filling them with earth. 16 Then Abimelek said to Isaac, “Move away from us; you have become too powerful for us.” 17 So Isaac moved away from there and encamped in the Valley of Gerar, where he settled. 18 Isaac reopened the wells that had been dug in the time of his father Abraham, which the Philistines had stopped up after Abraham died, and he gave them the same names his father had given them. 19 Isaac’s servants dug in the valley and discovered a well of fresh water there. 20 But the herders of Gerar quarreled with those of Isaac and said, “The water is ours!” So he named the well Esek,[c] because they disputed with him. 21 Then they dug another well, but they quarreled over that one also; so he named it Sitnah.[d] 22 He moved on from there and dug another well, and no one quarreled over it. He named it Rehoboth,[e] saying, “Now the Lord has given us room and we will flourish in the land.” 23 From there he went up to Beersheba. 24 That night the Lord appeared to him and said, “I am the God of your father Abraham. Do not be afraid, for I am with you; I will bless you and will increase the number of your descendants for the sake of my servant Abraham.” 25 Isaac built an altar there and called on the name of the Lord. There he pitched his tent, and there his servants dug a well. 26 Meanwhile, Abimelek had come to him from Gerar, with Ahuzzath his personal adviser and Phicol the commander of his forces. 27 Isaac asked them, “Why have you come to me, since you were hostile to me and sent me away?” 28 They answered, “We saw clearly that the Lord was with you; so we said, ‘There ought to be a sworn agreement between us’—between us and you. Let us make a treaty with you 29 that you will do us no harm, just as we did not harm you but always treated you well and sent you away peacefully. And now you are blessed by the Lord.” 30 Isaac then made a feast for them, and they ate and drank. 31 Early the next morning the men swore an oath to each other. Then Isaac sent them on their way, and they went away peacefully.
Clement in turn takes what Philo wrote and develops it into a divine mystery:At all events, according to the most holy Moses, the end of all wisdom is amusement and mirth, not such mirth as is pursued by foolish people, uncombined with any prudence, but such as is admitted even by those who are already grey, not only through old age alone, but also through deep thinking. Do you not see that he speaks of the man who has drunk deeply of that wisdom which is to be derived from a man's own hearing and learning, and study; not as one who partakes of mirth, but who is actually mirth in itself? (169) This is Isaac, for the name Isaac being interpreted means "laughter," with whose character it is very consistent that he should have been sporting with "perseverance," which the Hebrews call Rebekkah. But it is not lawful for a private individual to behold the divine instruction of the soul, but the king may behold it, as one with whom wisdom has dwelt for a very long time, if we may not rather say that it dwells with him all his life. His name is Abimelech, who, looking out through the window with the well-opened and radiant eye of the mind, saw Isaac sporting with Rebekkah his wife. (170) For what employment is more suitable for a wise man than to be sporting, and rejoicing, and diverting himself with perseverance in good things? From which it is plain that he will become intoxicated, since intoxication contributes to good morals, and also produces relaxation and advantage; (171) for unmixed wine seems to increase and render more intense all the natural qualities, whether they be good or the contrary, as many other things do too. For money is to a good man a cause of good things, and to a bad man, as some one has said, it is a cause of bad things. And again, high rank makes the wickedness of a fool more conspicuous, but it renders the virtue of the just man more glorious.
I find this radical interpretation of the Philo's exegesis quite shocking. He goes from a typical Philonic interpretation of Genesis to a discussion of martyrdom. Remember this narrative happens AFTER the Akedah in the ordering of Genesis - i.e. the sacrifice of Abraham occurs in chapter 22, this is chapter 26. The idea that Abimelech could be God - and necessarily an ignorant divinity as Abraham already fooled Abimelech is quite incredible.In contradistinction, therefore, to the older people, the new people are called young, having learned the new blessings; and we have the exuberance of life's morning prime in this youth which knows no old age, in which we are always growing to maturity in intelligence, are always young, always mild, always new: for those must necessarily be new, who have become partakers of the new Word. And that which participates in eternity is wont to be assimilated to the incorruptible: so that to us appertains the designation of the age of childhood, a lifelong spring-time, because the truth that is in us, and our habits saturated with the truth, cannot be touched by old age; but Wisdom is ever blooming, ever remains consistent and the same, and never changes. "Their children," it is said, "shall be borne upon their shoulders, and fondled on their knees; as one whom his mother comforteth, so also shall I comfort you." The mother draws the children to herself; and we seek our mother the Church. Whatever is feeble and tender, as needing help on account of its feebleness, is kindly looked on, and is sweet and pleasant, anger changing into help in the case of such: for thus horses' colts, and the little calves of cows, and the lion's whelp, and the stag's fawn, and the child of man, are looked upon with pleasure by their fathers and mothers. Thus also the Father of the universe cherishes affection towards those who have fled to Him; and having begotten them again by His Spirit to the adoption of children, knows them as gentle, and loves those alone, and aids and fights for them; and therefore He bestows on them the name of child. The word Isaac I also connect with child. Isaac means laughter. He was seen sporting with his wife and helpmeet Rebecca by the prying king. The king, whose name was Abimelech, appears to me to represent a supramundane wisdom contemplating the mystery of sport. They interpret Rebecca to mean endurance. O wise sport, laughter also assisted by endurance, and the king as spectator! The spirit of those that are children in Christ, whose lives are ordered in endurance, rejoice. And this is the divine sport. "Such a sport, of his own, Jove sports," says Heraclitus.
For what other employment is seemly for a wise and perfect man, than to sport and be glad in the endurance of what is good-and, in the administration of what is good, holding festival with God? That which is signified by the prophet may be interpreted differently, namely, of our rejoicing for salvation, as Isaac. He also, delivered from death, laughed, sporting and rejoicing with his spouse, who was the type of the Helper of our salvation, the Church, to whom the stable name of endurance is given; for this cause surely, because she alone remains to all generations, rejoicing ever, subsisting as she does by the endurance of us believers, who are the members of Christ. And the witness of those that have endured to the end, and the rejoicing on their account, is the mystic sport, and the salvation accompanied with decorous solace which brings us aid.
The King, then, who is Christ, beholds from above our laughter, and looking through the window, as the Scripture says, views the thanksgiving, and the blessing, and the rejoicing, and the gladness, and furthermore the endurance which works together with them and their embrace: views His Church, showing only His face, which was wanting to the Church, which is made perfect by her royal Head. And where, then, was the door by which the Lord showed Himself? The flesh by which He was manifested. He is Isaac (for the narrative may be interpreted otherwise), who is a type of the Lord, a child as a son; for he was the son of Abraham, as Christ the Son of God, and a sacrifice as the Lord, but he was not immolated as the Lord. Isaac only bore the wood of the sacrifice, as the Lord the wood of the cross. And he laughed mystically, prophesying that the Lord should fill us with joy, who have been redeemed from corruption by the blood of the Lord. Isaac did everything but suffer, as was right, yielding the precedence in suffering to the Word. Furthermore, there is an intimation of the divinity of the Lord in His not being slain. For Jesus rose again after His burial, having suffered no harm, like Isaac released from sacrifice.
The idea that Isaac interacting with Rebecca somehow represents Christ and his Church is interesting. But the idea that interaction represents the crucifixion which is intended to open God's eyes to the existence, essentially, of another power is very Marcionite. Remember the Eznik of Kolb says that Christ's death served the purpose of bringing about the Creator's repentance. There was no evidence for the existence of this myth outside of Eznik's report until now.
The use of Philo's exegesis of chapter 26 appears in the Stromata:
Clement also interprets the narrative with different 'clues' or meanings for the Hebrew names:And Isaac is shown to mean "self-taught;" wherefore also he is discovered to be a type of Christ. He was the husband of one wife Rebecca, which they translate "Patience."
Whether, then, the time be that which through the seven periods enumerated returns to the chiefest rest, or the seven heavens, which some reckon one above the other; or whether also the fixed sphere which borders on the intellectual world be called the eighth, the expression denotes that the Gnostic ought to rise out of the sphere of creation and of sin. After these seven days, sacrifices are offered for sins. For there is still fear of change, and it touches the seventh circle. The righteous Job says: "Naked came I out of my mother's womb, and naked shall I return there;" not naked of possessions, for that were a trivial and common thing; but, as a just man, he departs naked of evil and sin, and of the unsightly shape which follows those who have led bad lives. For this was what was said, "Unless ye be converted, and become as children," pure in flesh, holy in soul by abstinence from evil deeds; showing that He would have us to be such as also He generated us from our mother -- the water. For the intent of one generation succeeding another is to immortalize by progress. "But the lamp of the wicked shall be put out." That purity in body and soul which the Gnostic partakes of, the all-wise Moses indicated, by employing repetition in describing the incorruptibility of body and of soul in the person of Rebecca, thus: "Now the virgin was fair, and man had not known her." And Rebecca, interpreted, means "glory of God;" and the glory of God is immortality. This is in reality righteousness, not to desire other things, but to be entirely the consecrated temple of the Lord. Righteousness is peace of life and a well-conditioned state, to which the Lord dismissed her when He said, "Depart into peace."