From the Project Wayfinder site:
WHY IS IT IMPORTANT?
Having purpose is fundamental to cultivating a meaningful life because it connects you to your raisons d'être, things that matter deeply to you and give your life direction.
Purpose amongst teens has been shown to facilitate identity formation, increase positive attitudes towards diversity, attenuate antisocial behavior and bullying, decrease engagement in risky behaviors, and increase academic engagement. Furthermore, interventions to promote purposeful behavior have been found to lead to significant increases in grade point averages.
But purpose isn’t just important for young people. Adults with a purpose in life report higher levels of psychological well-being, flourishing, hope, resilience and life satisfaction. Furthermore, purposeful people have been found to live longer and have significantly lower incidences of heart attack, Alzheimer’s disease, and stroke."