What is a miracle? A miracle does not create, nor really change at all. It merely looks on devastation and reminds the mind that what it sees is false.
My interpretation is if you believe that everything eventually works for good you can look at all things as a part of the process. This changes the mind from thoughts of, "this is horrible, that is evil, why do these horrible things happen?" to, "I don't know why this happened but I know that somehow it is part of a grand process for good"