I'm writing a paper for a philosophy elective on the Cosmological argument. One of my counter arguments is that a causal loop (treated as a paradox in the Cosmological argument in favor of a creator) is not a paradox if time is cyclic in nature rather than linear. I treat the fact that the universe is flat with zero energy as a given but something is a little unclear to me. In a flat (and accelerating?) universe, would time be cyclic, linear, or could it be either one? I am personally more inclined to think that time has no beginning or end (cyclic) and is just another dimension and that it's apparent flow is really an illusion. Am I on the right track here?