Who ARE You?” This was not an encouraging opening for a conversation. Alice replied, rather shyly, “I — I hardly know, sir, just at present — at leas… - Lewis Carroll

I knew who I was this morning, but I've changed a few times since then.

I — I hardly know, sir, just at present — at least I know who I WAS when I got up this morning, but I think I must have been changed several times since then.

I don't like the looks of it,' said the King: 'however, it may kis my hand, if it likes.'
'I'd rather not,' the Cat remarked.

Dear, dear! 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!

"When we were little," the Mock Turtle went on at last, more calmly, though still sobbing a little now and then, "we went to school in the sea. The master was an old Turtle - we used to call him Tortoise -"
"Why did you call him Tortoise, if he wasn't one?" Alice asked.
"We called him Tortoise because he taught us," said the Mock Turtle angrily: "really you are very dull!"