'I can't explain myself, I'm afraid, sir' said Alice, 'because I'm not myself, you see.'
'I don't see,' said the Caterpillar.
'I'm afraid I can't put it more clearly,' Alice replied very politely, 'for I can't understand it myself to begin with; and being so many different sizes in a day is very confusing.'
'It isn't,' said the Caterpillar.
'Well, perhaps you haven't found it so yet,' said Alice; 'but when you have to turn into a chrysalis--you will some day, you know—and then after that into a butterfly, I should think you'll feel it a little queer, won't you?'
Alice in Wonderland (1865) by Lewis Carroll.
Chapter 5: Advice from a Caterpillar.