Why this world?

Lord, said David, since you do not need us
Why did you create these two worlds?

Reality replied: O prisoner of time
I was a secret treasure of kindness and generosity
And I wished this treasure to be known
So I created a mirror
its shining face, the heart
its darkened back, the world
The back would please you if you've never seen the face.

Has anyone ever produced a mirror out of mud and straw?
Yet clean away the mud and straw, and a mirror might be revealed.

~"Love is a Stranger", Jelaluddin Rumi