How to understand "law is an objective right and right is a subjective law"

Hello, this is mentioned by Mr. Yelin, a German jurist, in his speech "The Struggle of Law" which has been handed down for generations.

Rights are subjective laws and laws are objective rights. For obligees, exercising and safeguarding their rights is not only a personal matter, but also a social obligation. Fighting for rights, that is, fighting for the law, is of great ethical significance to human existence.

If you can give detailed information, you can give a more detailed answer.