What is mans purpose?
We are created in God's image and likeness, but why did God choose to create us like this?
I believe it was in order to reveal His greatness and glory through us.
We are meant to reveal Him in much the same way as a crystal or diamond reveals the light that shines through them.
These stones allow light to pass through them because they are transparent.
In like manner, we must be transparent for God's nature and character to shine through us.