Let's see...
wikki wrote...
A miracle is a perceptible interruption of the laws of nature, such that can be attempted to be explained by divine intervention,
wikki wrote...
Luck is a belief in good or bad fortune in life caused by accident or chance which happens beyond a person's control.
Based on the definitions above... those two have different meanings, although some think they're the same... Yes, at some point they're the same but it all depends on the situation it has occurred...
You can't say it's a miracle when you accidentally found a dollar on the street. Or maybe even if you managed to dodge a bullet... Why? because there were no unexplainable thing that happened during the incident...
Now it will become a miracle if you got hit by the bullet in the head, went into a comma, then woke up... you can't just explain how a dude wake from a comma, right??...
same goes for luck (may it be bad or good)...
recovering from a very deadly disease with no possibility of a cure can't be just called luck... it will become luck when all of a sudden there was a vaccine that was just made to cure the disease...
*luck might be just due to coincidence. And miracle, for all I know, may be done by God...