Giving Useful Service is Fulfilling Purpose
Everyone born into this great world has been given the natural ability and genetic programming to become a great person with a great future.
The only problem with this is that the programming of their genetic potential and ability will never develop fully, much less grow and mature, unless they give their abilities and potential to others in the form of useful service.
Servitude is the key to blossoming. This is not serving as a waiter or waitress, but is serving others with your skill and ability to enhance someone else and society as a whole.
This is fulfilling purpose, your purpose.
What service are you offering the world or to someone?