However long the sun shines upon a thistle, it will never become a rose.
More German Proverbs:
The cat loves fish, but is loth to wet her feet.German
Full vessels give the least sound.
German
Advice should precede the act.
German
Every clown can find fault, though it would puzzle him to do better.
German
Yorkshire born and Yorkshire bred, strong in the arm and weak in the head.
German
Who bathes his hands in blood will have to wash them with tears.
German