When Isaac laid his hands on Jacob a second time, this time with full knowledge of whom he was blessing, he called down the name by which the patriarchs had always known the Holy One in His covenantal fullness: El Shaddai, God Almighty, the One whose blessing is enough.
The Targum Pseudo-Jonathan sharpens the promise. Jacob will not merely have descendants. He will increase into twelve tribes (Genesis 28:3) — the exact architecture of the future nation. And those tribes will be worthy of a Sanhedrin, seventy elders, matching the seventy nations of the world. Every family line of humanity mirrored by a seat in the Jewish high court.
The number seventy is no coincidence. When the peoples were divided after the Tower of Babel, they scattered into seventy nations. Now Isaac blesses Jacob that Israel will produce a court large enough to hold the moral weight of all of them. One Sanhedrin for seventy nations. One people chosen to refine the law until it can speak to every tongue.
The blessing stretches forward across centuries. It will reach Sinai, where seventy elders will ascend with Moses and see the sapphire pavement beneath the feet of God (Exodus 24:10). It will reach the Chamber of Hewn Stone on the Temple Mount, where the Sanhedrin will sit. Isaac cannot see any of it — he is blind — but he can feel it moving through his hands.
The takeaway: a true blessing is not a wish for success. It is a description of the shape your life will take if you keep the covenant. Isaac saw the Sanhedrin before the Sanhedrin existed.