In the world at large, change is a constant. The natural world, the societal world, communities, architecture, fads and fashion—they all exist in a state of irrepressible change.
Individuals change, as well. A friend recently remarked at the profusion and dark color of my hair in an '80s-vintage photo. Sadly my pate, once a dense rain forest, is now a parched savanna.
Though we may no longer look as we did thirty-five years ago, though the circumference of our midsection modulates from season to season and year to year, though our desires and passions have steadily e- or devolved with the decades—though the child inevitably becomes a youth and the youth becomes an adult, there is one thing about every one of us that does not change.
So long as man and woman tread the soil of this earth they remain of sinful flesh.