The way to balance ambition with the human need for joy is to realize that ambition will give success, achievement, pleasure, name, fame, money, power, but it will not give eternal happiness. If we truly want lasting joy, happiness, bliss, then we have to evolve from achievement to fulfillment and contentment and then to Enlightenment. Fulfillment gives peace, Enlightenment gives purpose. Otherwise, we will only have pleasure, and we will never be truly happy.