He who teaches children learns more than they do.
More German Proverbs:
Never tickle the nose of a sleeping bear.German
The better the fruit, the more wasps to eat it.
German
There are many preachers who don't hear themselves.
German
A lordly taste make a beggar's purse.
German
One has only to die to be praised.
German
Be not ashamed of your craft.
German