A crow does not louse the buffalo to clean him but to feed himself.
More Hungarian Proverbs:
Against a thousand crows one stone is enough.Hungarian
He can see the splinter in another's eye but cannot see even the beam in his own.
Hungarian
Even God our Lord has given way to a drunken man.
Hungarian
It will not last longer than frying an egg.
Hungarian
A hasty work is seldom good.
Hungarian
A mester is a master in hell as well.
Hungarian