Every week at shul we bless the sons in our community with this blessing, as Jacob instructed us to do. (We also bless the daughters, of course, that they would be like Sarah, Rebekah, Rachel, and Leah.) It’s always an encouragement to look from the bima and see fathers and mothers blessing their children. But why do we do this, aside from following the instruction that Jacob gives us? And why Ephraim and Manasseh?