before i start maybe you could have different title for your topic
This is good thinking and my opinion is that yes there are limits based on the physical body. For example toxins for the physical body and other dangers.
However, if you are in sync with the Universe... you will not come into contact with these toxins in the first place. Or murderers. Or Accidents. Or what have you bad stuff.
Bodies need food and air.. yes. But if your belief is strong enough... you don't need either. To be at that level... you would have to be a true Master. Hey which reminds me Steve is almost there... what with 3 hr. sleep days
haha.
The weakest link in the body breaks.