I don't think most people are fully mature until 30. A lot of maturation and self awareness occurs post college when you are on your own. Most people should not get married until they really know their nature, have come to grips with it, and have a life plan which takes until you are about 30. Some younger, some older.
Once there, as billfred, 30 to 40 is a time of executing the plan and attaining goals. 40-50 is for advancing those goals and reaching your maximum earning/ power positon and hopefully cementing yourself at the pinnacle of your plan. Ask me in ten years how 50- 60 goes.
Fitness, feelings and spirituality are all well and good but in the end economic success defines how we are percieved by most people, how we will live our lives, and how comfortable our retirment will be. Fitness, feelings, and spirituality guide us in choices, help us recover from adversity, and help us have faith as we execute the plan but most of society does not see them as metrics of success.
S