You can only force yourself to do something for so long. When the energy fades, a person just burns out. Once this happens, change becomes a necessity.
This is not caused by a lack of will, but a lack of interest. One feels as if their wheels are just spinning. No matter the effort employed, they are going nowhere.
It is not necessary to love what you do. Even if you are trudging along, the bills still get paid. But what happens when a person simply grinds to a halt?
Then, something else must be found. What can be done is limited only by what can be imagined. However, changing direction is not such a simple task.
Following a path is easier than blazing a new trail. We cannot face our fears by remaining where it is safe. Risks are inherent in any worthwhile venture.
The dream is to live doing what we love. It takes a great deal of work to realize what is desired. The burdens will be great, but the satisfaction greater.