"Is it possible for the universe to be infinite - could it have possibly existed forever? If the universe has existed forever, there could be no beginning for it. Without a beginning, the universe could not be in progress... whatever is causing change now would have already occurred in the boundless past. Time would really be meaningless and progress is defined by time - it is state with relation to time. Yet we know that the world is falling into decay... if such a process had been occurring forever, order would not now exist, and could have never existed in the first place since in order for order to have been decaying over an infinitely long period of time, its extent must be infinite. Progress always occurs over a definite period of time, especially progress which is spiraling downward like our universe is - entropy. So if we look backwards at the progress of our universe, it would be progressing upward toward order - given the assumption that the cosmos is eternal. If there were ever a point where it reached order, that would be a beginning, a point when the process of decay started. But behind that point would lie "another" infinity of time, during which all possible changes would already have occurred - if change could indeed occur in infinity. You can argue backward forever, literally, and never reach a point where change could have started that would not have been already preceded by an infinite amount of time. And infinite things don't have beginnings, they always have been. Progress is by nature a thing bounded by time, and so cannot be applied to things which are infinite, which are not bounded by time. If you can think of it mathematically, progress is the amount of change per unit of time, and if the amount of time that you multiply this proportion by is infinite, so then is the amount of change which results. And since at any "point" in infinity there is an infinite amount of preceding time, the amount of preceding change that would have occurred - were there a process ongoing - would be infinite. As such, there would never have been, not be now, and never will be a point in time when there would be any change left to occur. And since there never was such a point, such a process could never have started. The only way for it to start is for something else to have started it, something else which is not in progress, never has been, and never will be; but is capable of creating existence which has a beginning and an end, and as such is in progress."
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