If you think -- or try to argue the existence -- of God in terms of epistemology, rationality, and/or empiricism, then you are probably on shaky grounds. Because God, for the most part, or the most common-sense part, defies rational-empirical epistemology.
Better instead, to argue the existence of God in terms of 'religious and/or spiritual idealism'.
In this scenario, it is better also to take personal responsibility for the contents and direction of your self-projected spiritual idealism.
My form of self-projected, spiritual idealism comes mainly from the influence of such philosophers as Heraclitus, Spinoza, Hegel, and Schelling -- a romantic form of integrative (homeostatically balanced) dialectical negotiation, integration, unity, and wholism (the different spiritual parts of Man, Nature, and God all coming together into one 'multi-dialectic-humanistic-existential-unified whole'.
By this 'Heraclitean-Spinozian-Hegelian-Schellian' interpretation of the romantic integrative spirituality ofo Man, Nature, and God -- there are parts of God, Nature, and Man in all of us -- and we all need to 'triangulate the respective energies of these three life forces -- 1. God (Transcendence, Creativity, Becoming, The Wish to Soar High in the Universe...); 2. Nature (Being, Here and Now, Groundedness, Beauty, Homeostatic Balance, Multi-Dialectic Unity, Harmony and Wholism, Evolution...); and 3. Man (The Bridge between Man, Nature and God seeking elements of everything above -- a romantic-spiritual unity between these three sets of life forces).
In a nutshell then, according to my DGB vision of romantic-spiritual idealism...
Man must homeostatically balance elements of God, Nature, and his/her own creative needs of freedom, being and becoming within a social-political-natural environment of multi-dialectic-negotiation and integration.
-- dgb, July 25th, 2008.
Where 'Hegel's Hotel' is the name of this philosophical treatise and forum, consisting of a network of some 50 evolving blogsites on such subject matters as: introductions, narcissism, language, semantics, epistemology, and truth, ethics, the history of philosophy, psychology, politics and more...'DGBN' is a triple acronym standing for David Gordon Bain (that's me), 'Democracy Goes, Beyond Narcissism', and 'Dialectic-Gap-Bridging-Negotiations'... dgbn, Nov. 29th, 2008.