Beard and cloak do not make one a philosopher.
More German Proverbs:
The devil is in the details.German
Take one step to hell and you are already half way there.
German
A little too late is much too late.
German
Fir and water are good servants, but bad masters.
German
So long as the belly is silent all whores are virgins.
German
When blind leads the blind, both fall into the ditch.
German