Why is Allah just to us even if he punished all of us?

The following is a part of a hadith: > If God Almighty tormented the people of His heavens and the people of His land, He would have tormented them not unjust to them - [Link to hadith](http://hadith.islam-db.com/single-book/52/%D9%85%D8%B3%D9%86%D8%AF-%D8%A3%D8%A8%D9%8A-%D8%AF%D8%A7%D9%88%D8%AF-%D8%A7%D9%84%D8%B7%D9%8A%D8%A7%D9%84%D8%B3%D9%8A/18213/615) , but I found the translation [here](https://motamiiz.com/trend/%D8%A3%D9%85%D8%AB%D9%84%D8%A9-%D8%B9%D9%84%D9%89-%D8%A7%D9%84%D9%82%D8%B6%D8%A7%D8%A1-%D9%88%D8%A7%D9%84%D9%82%D8%AF%D8%B1/) - Allah knows that we humans are weak; so it should be unjust for him to torment all of his creatures. but what about creatures that can't disobey him (angels)? --- My conclusion: The fact that Allah **appreciates our efforts to obey him**, **appreciates that it isn't satisfying for us to obey Him all of the time** and **forgives us** is **mercy**, while **justice** is kind of robotic (you disobey, you get punished) and is not what we want, so thanks Allah for Your mercy.