Stress is not a state of mind... it's measurable and dangerous, and humans can't seem to find their off-switch.
Robert M. SapolskyWhat does the frontal cortex do? Gratification postponement, executive function, long-term planning, and impulse control. Basically, it makes you do the harder thing.
Robert M. SapolskyThe frontal cortex is an incredibly interesting part of the brain - ours is proportionately bigger and/or more complex than in any other species.
Robert M. Sapolsky