you don't get GIVEN a purpose, you have to work it out for yourself. Try the "tombstone" test. Decide what you would most like to have written as an inscription on your tombstone. Whatever it is (great parent, gave time to others, great devotion to duty, spent time in spiritual studies, interested in the welfare of others, great scientist / philosopher, fantastic entrepreneur, etc) THAT is your purpose. Once you know your purpose, then you can work out an action plan to achieve it.