It is more necessary to guard the mouth than the chest.
More German Proverbs:
A fish should swim thrice: in water, in sauce, and in wine.German
Love your neighbor, but don't tear down your fence.
German
With one foot in the grave.
German
Never tickle the nose of a sleeping bear.
German
Where water has been, water will come again.
German
The narrower the cage, the sweeter the liberty.
German