Was du ererbt von deinen Vatern hast,
Erwirb es, um es zu besitzen.
What you have inherited from your fathers,
Earn it. Thus it will be yours.
The “earn it” phrase is a bit tricky. Purchase it might be better. The point is, you’ve received it as a gift. Now make it your own. How? By paying for it.
When we make it free nobody gets it. You can’t have your heritage if you don’t love it.