Why did God create human beings?

Verse 7 of Chapter 18:
The fact is that whatsoever is on the earth, We have made it as its adornment so that we may test the people as to which of them does best deeds. In the end, We will turn all that is in it into a bare plain.

Verse 56 of Chapter 51:
I have not created the jinn and the men except for this that they should worship Me.

Verses 2-3 of Chapter 76:
Indeed, We created man from a mixed sperm drop, to try him, and therefore We made him capable of hearing and seeing. We showed him the way, whether to be grateful or disbelieving.