"G‑dliness is everything. Everything is G‑dliness."
-Baal Shem Tov.

Each of these paths contains what the other is missing: When we reveal that G‑dliness is everything, even the darkness is included. But the world experiences no lasting change. Because there is no world. There is only G‑dliness.

And that is what Abraham did with Ishmael. Ishmael reformed himself during his father's lifetime. And afterwards, he once again fell away.

When we know that everything is G‑dliness, we can transform the world by shoveling away the darkness to uncover the sparks of G‑dliness hidden there. But the darkness remains darkness.

That is what Isaac accomplished with Esau. Esau's head, we are told, rests on Isaac's lap in the cave. But his body remains out in the field.

The path of Jacob is to discover within each thing That Which Is Everything, while simultaneously bringing That Which Is Beyond All Things to dwell within each thing. Jacob knows a G‑d who is at once both beyond and within.

To Jacob, darkness is also light. Eventually, Jacob will redeem Esau.

Likutei Sichot vol. 15, pp. 191-199.