My flesh and my heart may fail,
but God is the strength of my heart
and my portion forever.
(Psalm 73:26)

Seems like our mortal bodies just don't hold up like they should, or at least the way I think they should.  No matter, God is walking beside us our entire life.... every minute of every day..... and when we can't walk, He carries us along the way.  

There will come a day when my body will be perfect in God's presence.   :)