Despite our bumbling, sinful nature, God continues to bless us in much the same way Isaac continues Jacob's blessing. On the surface, it may not seem "fair" that Jacob got the blessing in the way that he did. And, in my opinion, Jacob and Rebekah need not have helped God bring about His will in an underhand and deceptive way. But Isaac loved him through that, and God loves us through our shortcomings and mistakes.