Imagine that, for whatever reason, you identified as your mind and thus your brain. You didn't think of your body as much more than a "meat mech" that your mind/brain piloted.

You would do brain exercises and take nootropic supplements, but you neglected your body and became unhealthy. Then one day you have the realization that your brain needs the rest of your body to live, and everything is interdependent.

You stop identifying with the mind/brain and embrace your whole body as yourself.