In the book Communication: Principles for a lifetime, there is a discussion of self-awareness. It quotes Stephen Covey saying, that self-awareness ". . .allows us to stand apart and examine even the way we 'see' ourselves--our self-paradigm, the most fundamental paradigm of effectiveness. It affects not only our attitudes and behaviors, but also how we see other people."
The suggestion here is that time spent thinking and developing knowledge in this area will indeed help us to better understand and control our growth as a person. You don't have to depend on chance, or any other source of your own identity, to understand and control your own development.