No pains, no gains.
More German Proverbs:
In the evening one may praise the day.German
Don't carry your head too high, the door is low.
German
God gives the nuts, but He does not crack them.
German
Piety, prudence, wit, and civility, are the elements of true nobility.
German
Though you seat the frog on a golden stool, he'll soon jump off again into the pool.
German
If you don't want to be deceived, you must have as many eyes as hairs on the head.
German