By faith Isaac blessed Jacob and Esau in regard to their future.
Isaac had not forgotten the promise. He spoke of the future of his sons by faith. He believed that God would fulfill his promises, even though the promise had not come true yet.
I can remember as a child, thinking to myself about this promise. Here Abraham had been promised that his offspring would be numbered like the stars, then he only had one true son. After him Isaac, also a recipient of this same promise only has two sons, and only one of them is recipient of the promise. I can remember thinking to myself how difficult that would be for them to really believe that. Nearly three generations go by and there is still only one person that is recipient to the promise. If it had been me, I would be seriously questioning the process. How are we going to fulfill this promise if we can't get more than one guy?!
God's timing is perfect though. Now we can see the fulfillment of that promise. We can understand it to its fullest. The forefathers of faith only saw it from a distance, but they still believed.
O Lord, help me to believe today. I have so much more than they did. I know so much more of your promises than they ever knew. Help me to have the faith of Abraham and Isaac.