So how is it you believe the mind can't discover God for real? Is it because you have not learned to trust your own thoughts?
I think what you are saying is that you can make God be whatever you wish. He either is, and nothing I think about him would change him, or he doesn't and I am just wanting an imaginary friend that will pat my back when I need one.
How is defering your thoughts over to a non-existent being any different from solo meditation, reflection, etc.?