ETA: Now that I think about it, major spoilery spoilers. Weird how the basic plot points just seem so obvious, they cease to seem like spoilers after a while. So let's put a cut in there.
I told a story, that's all. No weapons, just words. I did just what The Doctor said. I went across the continents, all on my own. And everywhere I went I found the people and I told them my story. I told them about The Doctor.
If you know me, you know why that gets me (as we say in the Moffat fandom) right in the feels. Also, the bizarre beauty of what comes just after, and the victory shorn of gladness. And there's something about this song that calls it to mind for me.
That's all. :-)