“Then Jacob gave Esau some bread and some lentil stew. He ate and drank, and then got up and left. So Esau despised his birthright.”
Genesis 25:34 NIV
How often we "sell" our spiritual inheritance short of God's intended abundance. Esau gave way to impatience, the desires of flesh, and natural hungers. In so doing he "despised" his birthright. For the middle eastern mindset, it is not so much that he hated the gift of his birthright, only that in comparison to his PURSUIT of some stew it seemed to be despised.
Modern believers might say that they do not despise the promises of God, but in comparison to our PURSUITS of the things of the world we have sold short.