A lifetime of training, of self control, of hiding everything as far as it will go, and Anakin still knows how to cut him deeper than anything else. Of all the failures, all the atrocities his Padawan committed that Obi-Wan knows is at his door, the younglings weigh the heaviest.

But he won't add Luke to that burden.

Anakin was always the strongest in the force, but Obi-Wan can still stand, can plant his heels into the floor and make him work for every inch. And all of this, with all the effort, he cannot let himself lose it. Cannot make the mistakes he made on Mustafar.

He refuses to meet the anger. Makes himself keep that calm.

"You'll never have him, Vader. He will never belong to you."