The real purpose in our life is not what we decide to do in our chosen career, or what we get paid to do professionally for a living.
Our purpose is what happens to others when we do what we do. These are aim, design, endgame, goal, good intentions, and objectives. While all these words mean "what one accomplishes or attains," purpose suggests a more settled determination.
Do we love what we do to others when we do what we like to do? That is the real meaning of our purpose for being who we have become.