Neuroplasticity

What we call the "self"--how we experience ourselves--is the result of all that we internalize from people and events.
Because we are always having new experiences--and can internalize these--we are always, to some degree, remaking who we are.
Every activity we engage in provides us with feedback about ourselves: our abilities, how we're perceived by others, our character. In selecting what we do, who we do it with, and how we do it, we can structure our experience to create mirrors of success and mastery.