Catherine Valenti said this quote

“ The Doctor is all of us, he lives and dies as all of us, and we need him to – because no matter the anvil-imagery of the Doctor as Christ, this is actually a far older and far simpler story than that. Everything changes. We all regenerate. I am not the same woman who first saw Rose ascend. Years go by and I become someone new, with the same memories but a new face, a new self. ”