He counts his chickens before they are hatched.
More Dutch Proverbs:
The devil has his martyrs among men.Dutch
Coin a phrase.
Dutch
He who is outside his door already has a hard part of his journey behind him.
Dutch
Folly hath eagle's wings, but the eyes of an owl.
Dutch
The eyes are bigger than the belly.
Dutch
The eyes are bigger than the belly.
Dutch