What is right for the one is reasonable for the other.
More German Proverbs:
Every clown can find fault, though it would puzzle him to do better.German
Every mother's child is handsome.
German
There's no making apples of plums.
German
Keep within compass and you may be sure that you will not suffer what others endure.
German
First weigh, then venture.
German
Ingratitude is the world's reward.
German