The key that is used grows bright.
More German Proverbs:
No one is too old to learn.German
If you don't want to be deceived, you must have as many eyes as hairs on the head.
German
Three women, three geese, and three frogs, make a fair.
German
Every priestling conceals a popeling.
German
Idleness has poverty for wages.
German
Better play at small game than stand out.
German