Faith...its a derivative of the whole, a creator.
Everyone has faith in something, observable or nill, be it theology, physics, or "null hypothesis". Epistemology is within the very ordered cognitive syntax itself. Interaction within the whole procreates the processes that in and of itself sustain the material universe. Nothing remains static...humanity's ability to observe the fourth demension solidifys this. Thus everything percieved dwells within the conscience mind. The information loop that brought about reality as rhetorical conceptual quotes; "I think, therefor I am". In conclusion, one can only be certain that they themself exist by cognitive assimilation of thought all brought to you by "faith"...by logic and (my personal belief)...God.
Good read, upvote from me & thanks.