How To Find Faith When There Is No Hope

"According to your faith," said Jesus Christ, "be it unto you!" (Matthew 9:29, KJV).  What a statement!  He was talking to a man who was blind from birth.  This was no mere psychological stunt; no slight-of-hand trick.  Here was a man who had never seen the white clouds float by, or the smile of a child or the thin wisp of smoke as it curled over a hut in a distant village.  "In the same measure you believe, it will happen to you!"  Is it merely the power of positive thinking, the teaching that believing makes it happen, or is there a missing element in the whole picture?