There are at least two ways to answer this question.
You can speak of where you want to go. This is the story you tell about your Self — usually, a story that allows you to look good and feel proud. To some extent, this story is wishful thinking. But not completely. By putting aspirations into words, we nudge ourselves towards acting in their direction. If only by suggestion, or when we are otherwise indifferent between two actions. On the margin, this story we tell starts to influence the choices we make.
Alternatively, you can answer the question of “Where are you heading?” by looking at the actions you take. Assuming you knew nothing about yourself — and had no access to your stories or aspirations — except the visible actions you took today, yesterday, last week, and last month… where does it look like you are heading? Even better, if you have the courage: ask someone you know relatively well where they think you are heading.
The distance between these two answers is a measure of how much you are fighting yourself.
Also published on Medium.