With hard work, you can get fire out of a stone.
More Dutch Proverbs:
He that can reply to an angry man is too hard for him.Dutch
A fool by chance may say a wise thing.
Dutch
From little things men go on to great.
Dutch
With a friend behind you, you have a safe bridge.
Dutch
If he waits long enough the world will be his own.
Dutch
Heaviness may endure for a night, but joy cometh in the morning.
Dutch