If you do not take the distinction between good and bad very seriously, then it is easy to say that anything you find in this world is a part of God. But, of course, if you think some things really bad, and God really good, then you cannot talk like that. You must believe that God is separate from the world and that some things we see in it are contrary to His will. Confronted with cancer or a slum the Pantheist can say, "If you could only see it from the divine point of view, you would realize this also is God." The Christian replies, "Don't talked damned nonsense." 

-CS Lewis in Mere Christianity, Chapter 2