oh boy

The Duchess: You're thinking about something, my dear, and that makes you forget to talk. I can't tell you just now what the moral of that is, but I shall remember it in a bit.
Alice: Perhaps it hasn't one.

.....

The Duchess: Be what you would seem to be -- or, if you'd like it put more simply -- Never imagine yourself not to be otherwise than what it might appear to others that what you were or might have been was not otherwise than what you had been would have appeared to them to be otherwise.
Alice: I think I should understand that better, if I had it written down: but I can't quite follow it as you say it.

from 'Alice in Wonderland' - Lewis Carroll