Worldview is a popular term used in a variety of contexts. Unfortunately, its usage is frequently vague and often more descriptive than definitive. A specific definition is possible, however, by condensing the concept to the range of replies to the question, "How do I understand myself relative to ultimate truth?" This paper will explain that: (a) the emergence of a worldview is a natural and necessary by-product of the expansive nature of human thought, (b) it is the reference tool used to emulate objectivity in determining ultimate truth, and (c) this paradigm ultimately defines one’s self-identity. In short, a person cannot think and mature without necessarily constructing a worldview—an eternal self-identity.