When Yitzchak got within five years of his mother’s age of death, he worried that perhaps his time would come soon. He therefore wished to bless his children.
In order to convey the blessings of his father to his son, Esav, Yitzchak sent him on a special mission. He asked him to go trap an animal (Esav was an expert huntsman) and prepare it for his father the way Yitzchak liked.
Though Esav famously did not end up getting the brachos, he did get some life lessons, whether he internalized them or not.
When Yitzchak told Esav to hunt, he was hinting that it should be a wild animal, and not a domesticated one belonging to someone else. This was Yitzchak’s way of teaching Esav to rely on Hashem who will always provide for His children.
Then, he told Esav that his intent should be to prepare food that his father likes.
The motivations and intentions we have for even a mundane act can lift it to the spiritual. If Esav were to hunt as he always did, but with the intent that he was serving his father, then that action would be a mitzvah.
Of course, when we do mitzvos, we certainly must be sure that our thoughts are focused on doing the will of Hashem. And that is the true source of bracha.
