The baker's child goes hungry.

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Who eats it won't know the bitterness of the onion, but who chops it does.
The nose of him whose guide is a crow will never get out of the shit.
Having two ears and one tongue, we should listen twice as much as we speak.
One must ask about the delight of opium from one who smokes it.
What is salt to tasteless food, what is a word to a foolish head?