I thought this was an especially wise observation:
When a vocation fits who we are, by living it we feel ourselves growing into a stronger, truer self, even though the going gets rough and at times we feel confused and tired. The kind of “tired” we feel is worth noting. It is not that heavy, sad fatigue we carry around like a low-grade fever, a form of depression. Life work demands genuine expenditure. We spend ourselves, maybe exhaust ourselves. But the energy flowing out of us feels natural, just the opposite of feeling pulled at by others, who have their own ideas about what we ought to be doing. When we let this happen, we feel resentful and cranky and sad.