Yes I am an Ultramind instructor. And I can tell you there isn't one ultimate life long purpose. Life has many goals and to reach each goal you will have a purpose. The most powerful purpose is the one you are focused on at any given moment.
As long as you know why you are studying and what you want from your subjects you know your purpose and you will know when you have done what needs to be done. It expressed as the same purpose for each. and if it works for you then good.
Alex