The leaves of autumn blow about, so dry and brittle are they.  They will return to dust, only to be replaced in the Spring by new shoots.  All of life is like this.  The human body comes in green and lithe and over time becomes brittle.  This cannot be stopped, and why would you want it to?  Ah, yes, because you think that falling from the tree is the end of the story.  Yes, for the leaf’s structure it is the end, but the energetic pattern of the leaf remains.  You merely cannot see it.
 
What reappears in the springtime is following a pattern of consciousness.  Do you not see how all of life is like this, including your own?  You fear your demise, but it is only the demise of the body, not your pattern and most certainly not your consciousness.  You as spirit cannot grow brittle and die.  You are, indeed, forever young in spirit.   You grow eternally, yet never age in physical terms as you know it. 
 
May you find comfort in this knowledge.  Allow the body to age gracefully as you accept the grace of God in giving you eternal life.