The Question
The only thing left to wonder was whether it would ever stop. Those painful choices, unexpected goodbyes. Maybe it would end just when he ended, himself, when death finally came to him once and for all.
And that would be, also, a pain to deal with. Someone else was going to feel the fact that he was gone for good, and suffer. And while he couldn't avoid that, he also couldn't worry about that as well.
His life had already too many questions unanswered, and this was just another one to add to the pile.
Walking inside the TARDIS, he pretend none of this had came back to haunt him and focused on the next destination.
Keep on moving, like he always did.