"Wouldn't be here if I wasn't. Wouldn't be anywhere if I wasn't."

All that about a cure for some multiverse disease... he told himself it was for selfish reasons, that he just wanted to exist somewhere, didn't matter where, disease be damned. But his sacrifice meant nothing if they were all just going to die from some illness eventually, so when it came down to it, he didn't have much of a choice.

"Didn't expect to see you here. Wouldn't have thought you had it in you."