Allah said, "I am going to appoint a khalif on Earth." Al-Baqarah (2:30) and so he did. Angels did not understand the need for this. They were in doubt that they might have deficiencies. Do they have deficiencies? If so, they wondered what deficiencies they have had. Angels unlike human beings do not get to experience the manifestations of Allah's names. They do not know about the other divine names apart from the ones they are given. They praise and bless Allah with the only names they know. Are people the same? No!

Human beings knew the divine names that the angels did not know. So the angels were not able to praise and worship Allah the same way human beings were able to.

The angels who did not know this type of worship, continued to complain. And said "Will You place upon it one who causes corruption therein and sheds blood, while we declare Your praise and sanctify You?" (Al-Baqarah 2/30). But this was clearly being against Allah's decision.

Angels couldn't recognise that there were differences between them and people. If they could, they wouldn't be complaining. The angels do not have consciousness. They could not comprehend the truth, and they couldn't understand the heights and degrees of human beings' order. Man's rank, as you know, were superior than angels'.

In humans there are Divine Names and attributes which do not exist in angels.

SUPEREALITYOFHUMANITY