"I've met... similar people before, yes," the Doctor answered, giving a nod. "Not exactly the same situation, of course, but when you've met more than one transcendental species, well... I wouldn't say you've met them all, but you know what they have in common, what they can do."

Of course, if Mr H had been a human before he'd died and come back as this 'higher being' (he agreed that 'angel' was probably a bit too far, though being mistaken for one was an entirely different matter), that was definitely different than the usual sort.

After a brief pause, he grinned and added, "What to look for, as it were. And knowing what humans can't—or don't—do, well... That helps, too."