[When Saul glances up to meet Jesse's gaze again, he looks angry. His jaw is tense his eyes are narrowed and as soon as he speaks, his voice cracks.]

The only thing that's going to stop Walter White is death, Jesse. Whether someone kills him or the cancer finally catches up — that's the only way. That's it. Taking yourself out won't change anything. You're a variable. You're replaceable in that equation. It won't matter.

What about that don't you understand?