Exercise teaches us that to become stronger (read: more capable), you must grow through a process of exposure to controlled stress, recovery, then adaptation, so that you can handle the same stress loads with less conscious, intentional effort. This is a useful metaphor for handing other kinds of stress in our lives. Therefore, to overcome, you must develop your stress-capacity beyond whatever it is that is creating your fear, anxiety, or pain.
There are limitations to this simplification, such as bodily ailments and chronic systemic issues, but as a general idea, this shows an empowering approach that allows you to take responsibility over finding paths forward to good outcomes. You don’t have to resign yourself to passivity; it is possible to be active in redefining what you are capable of.