Brains

In his first book  Norman Doidge wooed millions with his tale of a plastic brain," THE BRAIN THAT CHANGED ITSELF ",that billions of cells cris crossedthe cranial vault,like flight paths, but whos routed weren't fixed, and could divert round stormy weather,
Orthodoxy has cast the brain as mallieablein infancy,but once the basics light sight and hearing were soldered in,that was your wiring diagram  for life.
The Neuroplastic brain is a work in progress,constantly learning and shaped by experiences.
The Cortex the brains outer layer, was a generic hard drive, that keep you balanced or fix your gaze are not indispensable , if taken out by stroke,tumour or similar their function can,with a little high tech coaching,be hosted at a different  cortical address..
Douglas Coupland maintained the greatest challenge to human life to day "will the individual triumph, or will the mob impose itself onto everone else "
The way to surviveis " is to figure out what you actually like doing-then do it " in that way you'll always be engaged and interested.
many people go to the grave without ever figuring out what they enjoy doing