Sarah is such a lesson to us. She had waited and waited and waited for her son, and then he arrived. You would think that the story would tell us that she lived content as a result for the rest of her days, but the Bible is too honest for that sort of Disney story telling. The boy was still young when Sarah's eye caught the flourishing laughter of Ishmael, the son of Hagar, her slave, and the woman that Sarah had used and abused as a sordid surrogate when she couldn't wait on the promises of the Lord. Her contentment was lost in the gaze of comparison. This is such a typical human response, finding ourselves unable to be satisfied with the blessings that God has given us, because our eyes are fixed on the blessings that He has given to another.