Most people don’t know their mission in life. Frequently their day of death has more significance than their day of birth. Why? When their life is over their purpose was made clear; and hopefully they achieved it.
When you are born you don’t know how your life will turn out because of your free will and the choices you will make. But there is a spiritual baseline to live by, so you should do good as often as possible. This is your path to contentment; by satisfying your soul instead of trying to satisfy the expectations of others.