Humans and Machines

Humans,
and Machines,
They're different.

Machine capacities, the more one uses them, the more they degrade. That's why we need warranties.
Human capacites, the more one uses them, the better they get. That's why there will never be warranties against change- For that change is called growth.

Also;

Machine capacities, don't use and it will inert at best
Human capacites, use it or lose it