Give an ass oats and he runs after thistles.
More Dutch Proverbs:
An ounce of patience is worth a pound of brains.
Dutch
Nothing so bad but it might have been worse.
Dutch
Fortune is round; it makes one a king, another a dunghill.
Dutch
He that hears much and speaks not at all -- shall be welcome both in bower and hall.
Dutch
Too err is human.
Dutch