Bob Deffinbaugh says:
C. S. Lewis once wrote, “A little lie is like a little pregnancy.” How aptly that statement summarizes the events of Genesis 27. Isaac, with the cooperation of Esau, conspires to thwart the purpose of God to fulfill His covenant with Abraham through Jacob. Rebekah, aided by her son Jacob, seeks to outwit and outmaneuver Isaac and Esau to maintain for Jacob the right of the firstborn, which he purchased from Esau.
The secular songwriter has caught the spirit of some Christian service and surely the heartbeat of this chapter in the song entitled, “Working Like the Devil, Serving the Lord.” It is difficult to discern who surpasses the rest in this web of scheming and deceit: Isaac, Rebekah, Jacob, or Esau.223 The family unit has been split into two factions, each headed by a parent who wants to live out his own expectations through his son, at the expense of the others. It is indeed a tragic story and yet one that rings true to life and reveals much of what we are like today.
"A web of scheming and deceit". That's exactly what happens when we lie. We tell more lies to cover the first lie and then more to cover those. It becomes like a web that entraps us and holds us. Deffinbaugh goes on to explain what he believes are three important underlying themes in this passage: urgency, secrecy, and conspiracy.
It had never really occurred to me that Isaac was just as manipulative as Rebekah. God had told Rebekah about Jacob's future and what he would do. But Isaac had planned to thwart God's plan by inserting his own agenda in his timing, not God's, in secret, with only the two of them knowing about it, and with plans to purposely go against God and he did under the guise of a celebratory meal.
Sin does not pay. It separates us from God. God can use our bad choices as part of his plan but his plan is not dependent on our sin.