WHO ARE YOU?

The Blue Caterpillar.
From Alice in Wonderland.

Caterpillar: Who... are... you?
Alice: Why, I hardly know, sir. I've changed so much since this morning, you see...
Caterpillar: No, I do not C, explain yourself.
Alice: I'm afraid I can't explain myself, you see, because I'm not myself, you know.
Caterpillar: I do not know.
Alice: I can't put it any more clearly, sir, because it isn't clear to me.