What does Genesis 27:12 mean?
Rebekah has a plan to trick her husband Isaac into giving the family blessing to Jacob instead of Esau. She has overheard Isaac's plans with Esau (Genesis 27:6–8), and has enlisted Jacob to help her in a scheme. She will prepare a meal for Isaac before Esau can return and do the same. Jacob will take that meal into Isaac and receive the blessing (Genesis 27:9–10). This not only reflects the family's ongoing problem with favoritism (Genesis 25:28), it's an example of Rebekah trying to "help" God by forcing his prophecies to come true, as she sees fit (Genesis 25:23).Now Jacob protests. He's not a hairy man like Esau. What if he gets caught? What if Isaac decides he is mocking the old man and gives him a curse instead of a blessing? Notice, Jacob is not concerned about replicating Esau's appearance. Isaac is nearly or completely blind (Genesis 27:1). He also does not express any worry about the difference in his voice, something that will very nearly ruin the whole scheme (Genesis 27:22). Most importantly, though, he is not—it seems—the slightest concerned about the morality of what he's about to do. He just doesn't want to be caught and punished.