We get worn out. Just like cars do. Parts get used up, and die off. Except in cars, these parts are totally replaceable. In humans, these parts are completely irreplaceable. As I look into my grandpa's eyes, and listen to his hoarse coughs, I realize that he will be one of the irreplaceble's. But that's okay, because that's what makes us even more special.
Love,
Alyssa