"In the beginning, there was no beginning. Who am I to tell time when to start?" ~ Me
Well, that's true, isn't it? Who am I, or you, or anyone else to dictate when time itself begins? We have no clue about the scales of which we speak. We pretend too, a false sense of self importance, but in all reality, all we've ever known are finite scales, not the infinite.
Human life is short. We're born, we live, we die. Everything around us follows similar patterns of birth, life and death, from trees, to animals to stars! Because of this, we seem prone to attaching that model onto everything, as if it's universally applicable.
The problem begins when finite starts losing its relevance. In math, the mathematicians cancel infinity as much as possible. They fear the lazy eight. Infinity is turned into some constant, or "normalized" as a way to make it disappear. It's with this rationale that I believe we start breaking down reality, forcing the space/time continuum into our own comfort zone. Since when did the universe have to appeal to OUR sense of comfort?
I'm actually okay with infinity, in both directions of scale. I bet once the LHC breaks open the "smallest" thing we know of, it will reveal even smaller things. And smaller, and smaller. The catch is that you need a lot of energy to get smaller and smaller. Infinite energy to reach infinite smallness. That's a hard goal to reach, and not very easy to get funding when your goal is infinite, so it's best to put a stopper on it and claim, "Voila! That's as small as she goes! Gimmie the cash to do that." At least until the next person finds something smaller.
As for infinite big, I'm good with that too. Same goes for time. I have no idea when it started, and honestly, I don't care that much. I could extrapolate a thousand generations from now and none of that time would be a fraction of a fraction of the time this planet has been around, much less the universe. Can we just be a little humble...just a little?
Also, we have no idea whether or not the universe itself is cyclical. There may be a crunch to accompany the bang and it's been going on for 10^100 years! Who knows!? So all this speculation could be for naught if the whole thing behaves like a gigantic heart.
Of course, during the process of trying to chase down infinity, you do learn many neat things, so I think it's high time we start looking at infinity as our friend, not the enemy, and see how things pan out with that new mindset.