This was a question here which has a link to here "Chinesische Weisheiten" = Chinese wisdom.
I don't really believe there is such a saying. I think it is "Quatsch", which is German for "rubbish, nonsense", but I'd like to ask you.
Eine gute Ehe ist ein Reisgericht, das man mit kaltem Wasser ansetzt und behutsam zum Kochen bringt.
A good marriage is like a rice dish, one should begin with cold water and slowly bring it to the boil.
Anybody know a saying like this??