For good or ill, we are slaves to our habits. No matter how much we may want to change a behavior, once it becomes a habit, our will seems to fade into irrelevance. We may want to get in shape, but that bag of chips somehow finds a way around our best mental defenses.
Using functional magnetic resonance imaging technology, neuroscientists and cognitive psychologists discovered that our habits are etched into our brains and are activated without our conscious awareness. Our executive mind may have put us on a diet, but our habitual mind grabs that brownie without the slightest remorse. Amazingly, up to 95% of what we do every day is under the control, not of conscious intention, but unconscious habits.