It is not the end of the physical body that should worry us. Rather, our concern must be to live while we're alive - to release our inner selves from the spiritual death that comes with living behind a facade designed to conform to external definitions of who and what we are.
We worry about appearing awkward in a presentation. But up to a point, most people seem to feel more comfortable with less-than-perfect speaking abilities. It makes the speaker more human - and more vulnerable, meaning he is less likely to attack our decisions or beliefs.
People get so in the habit of worry that if you save them from drowning and put them on a bank to dry in the sun with hot chocolate and muffins they wonder whether they are catching cold.
There is nothing that wastes the body like worry, and one who has any faith in God should be ashamed to worry about anything whatsoever.
We humans have lost the wisdom of genuinely resting and relaxing. We worry too much. We don't allow our bodies to heal, and we don't allow our minds and hearts to heal.