Why did Isaac think he had to bless Esau more than he did Jacob? One can hardly even consider that he hated Jacob, heaven forbid… Isaac knew that Jacob occupied himself with Torah study, and did not require a blessing, for Torah rises upward and adds to one's credit. The reason he did not want to bless him was because it wasn't necessary, and so that he would not depend on his blessing and shirk from Torah learning; this was not the case with Esau, who had no Torah learning and therefore did require a blessing.