We (I) take it for granted that when you fall down and break a bone that the intervention that is put in place – plaster-cast to immobilise the fracture to enable the healing to take place naturally – is all part of a natural process. The body has evolved to repair itself from illness (where it can) and from breakages (when it can and subject to the fact that the bits are brought together in the right place first).
What has been a revelation to me is just how amazing your body can be at “learning” how to cope with invasive and “unnatural” procedures. How is that your body can adapt to a procedure where a 1mm vein is taken from your leg, chopped-up into pieces, turned inside out, cleaned and then sewn (yes sewn) into a different part of your body (your heart) to provide a new channel for blood to flow? Your body (generally) accepts that this attack on itself is “normal” and it sets about learning new pathways to heal the scars and repair the artificial wounds and breakages. And it knows which is the best order to do this in. It knows what has to be diverted to exactly the right place to ensure successful healing.
What other word can you use other than “miracle”.