Late-night method

At present, I am reading the definition of 'Karma' on the great omnipresent purveyor of knowledge; Wikipedia. The notion of Karma, as well as it's offshoots and philosophical peers, is an increasingly valid and beneficial concept regarding one's navigation of the self and conscious mind, on this worldly plane. Emphasis is placed heavily, it seems, on finding a delicate balance that strays from externalities, negative concepts and actions, and toward increasing rationality and empathetic tendencies toward the self and the human other.
One concept that struck out at me, if only in fleeting thought, was how prevalent the notion of mental scrutiny and reflection was. The mind, in this process, is continually prone to re-evaluation, re-invigoration, and change. Now, I had always seen this as apart from a deity figure; a 'God'-like structure. I do not necessarily believe in an afterlife, nor do I believe in a great being that determines one's fate and dictates when one is pardoned from mortal sin. However, upon conscious consideration of the idea of Karma, one thing occurred to me: if most, if not all of our involvement-morally, ethically, worldly-in this life is based on our output of mental actions and conclusions, perhaps believing, even remotely, in a 'Higher Being' of sorts is a logical process in this mental achievement of enlightenment. If, by virtue that the mind is what determines the world, we are to believe-even at a distance-in a being that watches over all humanity, or the individualized self-a personal deity, perhaps this is exerting a mental-emotional power in recognizing the fickle, if not flawed nature of this concept, yet choosing to consciously believe in such a being, if only to enhance the overall karma and positive outlook of one's life.
Essentially... if belief, even skewed or not wholly apparent, makes one humble, or perhaps more optimistic at the nature and state of life, interactions, and the way of the world-is it mentally viable to, after a period of distance from this concept, believe if only for the sake of enhancing the self-experience in the world in an altruistic, selfless manner? Could this be another designation of a selfless act... to believe in something unproven, highly contested, if perhaps a bit scary, for the sake of making one's personal experience in the world, and what path one chooses to take in this lifetime, that much more rounded and fulfilled? Perhaps, for the highly introspective and contemplative mind-within whom rationality and logic are paramount-this is the absolute test of mental prowess: the choice to believe in a contestable concept so highly abused and tainted by modern religious practices, as a practice in mental control and functionality.
If I, then, allow myself to believe in a Higher Power, something above me and more worldly then I, something that makes me continually strive to better myself and better those around me, something that I can aspire to and look to as a purely mental manifestation of all I aspire to be and all that is humility-instilling in it's omnipresence and ethereal nature, something that represents both 'my enlightened self' and 'all that surrounds me'.... woah. I suddenly understand a little bit more what I must do in this life to achieve my full potentiality as a human being. And perhaps that is where it begins.