Values also determine what we become. A person who highly values harmony is not likely to be a trial lawyer. And your values are the key influencers in how you perceive your purpose. And if you really believed that life was just a crap shoot, then you wouldn't be reading this anyway. Purpose is what gives everything else meaning.
Purpose alludes to a 'higher calling' or ultimate end, and it transcends the individual.
Have a reason for living that is bigger than you. For most, it's about making a difference and leaving the world a better place. Everyone now alive will have passed on. Your purpose has an ongoing and life-long theme. Your purpose taps into passions, inspiration, and commitment on a grand scale.