I dunno, if there's one thing that's been repeatedly pointed out over series after series as the thing The Doctor has faith in, it's humanity, surely? We know he doesn't have faith in himself because of all those regrets - Donna, Astrid, Rose, The Master, not to mention the limegraves full of supporting characters…

"One small quibble: The TARDIS lands here by accident. Again. Do they ever end up in the right place anymore?" The last time the TARDIS was semi-reliable, a little girl kept calling the guy driving it "Grandfather."