I find it a bit insensitive to tell 'what he has to do' while not being in his situation. I do believe that you believe this and this comes from a good place but I can imagine that this can be quite a sting if he tried everything and then has to read this

Resorting to believe in miracles feels misguided.

He says in the post that expecting a miracle is a sure way to not make it happen, and yet you are telling him to do exactly that