How queer everything is to-day! And yesterday things went on just as usual. I wonder if I’ve been changed in the night? Let me think: was I the same when I got up this morning? I almost think I can remember feeling a little different. But if I’m not the same, the next question is, “Who in the world am I?” Ah, that’s the great puzzle!

Lewis Carroll (1832-1898) English writer and mathematician [pseud. of Rev. Charles Lutwidge Dodgson]

Alice in Wonderland, ch. 2 (1865)