HE is the beginning and the end just as HE is the resurrection and the life andcall men will have their beginning and end in HIM
..,or not
That also will be decided at the end of all these things
When all has been accomplished:
That is, when the full numbers in Christ are complete and He has put the last of His enemies under Him
this is already decided, which is exactly why God says: "it is done."(Revelation 21:6), because "i am the beginning and the end, the first and the last" says He speaking about Himself, not about me or you or anyone else, though thus talking also about the destiny(-ies) of us, the souls, i.e. His life also has a span(cycle), otherwise, if it wasn't so, there would be no beginning and end - it is like a revolving wheel (moving constantly in a circle on its axis), making full revolutions, and there must, of course, be some point that marks the end as well as the next beginning, at least as a measure, of the process of that wheel's repetitive revolution, because there is no other way for such a wheel to make full revolutions, otherwise there would be talk just about rotation, not (about) revolution, because no revolution would matter at all, and as it is with such a wheel, so it is with the eternity - it begins again whenever it ends, and all things that happened already happened before i.e. in every earlier eternity, because eternity is like a dvd with one movie always playing in repeat mode, and all scenes of the movie always repeat in exactly the same way as ever before, because nothing changes or is changed - it is a constant process, only the actors(i.e. the souls) are transposed/alternated as to the(ir) roles(i.e. positions) so that sooner or later every soul supersedes any other in position, personality and destiny, from this perspective all souls of the infinite universe are logically arranged in a circle(logical circle) that moves (spinning step by step like clock hands) one step forward every successive eternity, of course this doesn't mean there is nothing we can do, because we can at least work for overall salvation in the true One, which is the assurance we have from God that we will not suffer in next/future eternities at the time we prevent the suffering(s) for our neighbors(townsmen/cohabitants) in this eternity, yes, it depends also on what we do now/at every moment for others, not only on God...
Blessings