The repeated stroke will fell the oak.
More German Proverbs:
Two dogs over one bone seldom agree.German
Unlaid eggs are a long time becoming chickens.
German
The rich have medicines the poor have health.
German
Drinking a little too much is drinking a great deal too much.
German
If you don't make mistakes you don't make anything.
German
He who blackens others does not whiten himself.
German