Another quote from Larchet’s “The Theology of Illness”:
Nevertheless, for them (what the calls “holy people”) as for all mankind, perfect health of the body during this life can never be attained. In this world perfect health never exists in absolute form; health is always a matter of partial and temporary equilibrium. We can even say that health in this present age is simply a matter of a lesser illness, The very notion of ideal health is, in fact, beyond our comprehension, since it reflects no experience known to us in the life. In our present condition, “health” is always in some sense “illness” that has simply not appeared as such and/or is not significant enough to be identified as such.