There are some schools of philosophy or spirituality that  say, in one way or another, that the universe is just thoughts in the mind of God and everything in the universe is just thoughts in the mind of God.  Looking around at what the universe is like, I than have to ask myself: "what kind of thoughts!  Is God having a nightmare?"  
    This philosophy may be largely true, but if it is entirely true, than we would have to believe that all the evil in the world and in the universe, is created by God.  Therefore, nothing really is evil because God doesn't do evil.  
    So I can't accept that philosophy entirely.  It may be true that the universe is made up of thoughts, but I think it is more than the thoughts of God.  It is also the thoughts of Satan and man.  The thoughts of angels and demons.  The thoughts of every being capable of thinking effect affect the universe and make it what it is today.  That is why Jesus and others have warned us that thoughts can be sin just as deeds can.