There's often tension between doing what we want to do, and making your living. My father solved this problem for all his working life by having a series of riveting hobbies to occupy his thoughts and intellect when he came home from his routine job. However many of us have jobs so tiring and stressful that we have no energy for anything but blobbing out in the evening and weekends. Books exhort us to 'follow your passion' from the start. But this can be easier said than done. When we are young our interests are just developing, so what is the thing you love to do, anyway? And are you any good at it anyway? Or expectations or children come along, making money a priority over everything else.
Ideally of course, your job is your passion. And, ideally you have the opportunity to develop this passion until
a. You are doing what you want
b. it comes easily to you and you find people saying "I so admire you, you make it look so easy."
c. people pay you for it.