man, if you really want that we reason out these things, then let's think properly (on them), being aware that the greatest punishment is for the false prophets, so if any of us is not quite sure about something, then let's he or she not be hasty to express their opinion on that thing thus imposing a misbelief, but first be quick to reflect on it right enough, because what's the point to explain repeatedly to someone that e.g. 2+2=4 if he or she continues to deny it and even to impose something else instead of it (e.g. that 2+2=5)?!, in principle, i also prefer that there be indefinitely lasting life in heaven/paradise, that is absolutely endless for every soul, i.e. throughout the (whole) time's infinity, but the facts are obviously different, and so the truth too, and the truth is important, i personally cannot afford (to be more precise, don't dare) to change it, moreover, it can't be changed in the mind of God at all, and the worst thing is that such a change can, God forbid, be catastrophic/cause very great cataclysm(s) of world scale...
yes, God is not just indefinitely existing, but indefinitely living - He never passes completely and permanently, but this doesn't mean there is no transition for Him, and whatever it is said in the biblical scriptures, it is said on the basis of all that doctrine which is explained therein (throughout the Bible), for example Jesus says in the Gospels that every thing impossible with men is possible for God, but is He talking about every thing that a man could want?!, because there were a lot of people that even wanted to kill, rape, rob, and, in general, to do things that are harmful or painful to their neighbor(cohabitant/townsman), but of course the true God can't afford to support such acts, or let's take for example the case of the so-called omnipotence paradox of the stone, namely, could an omnipotent being create a stone so heavy that even they could not lift it?!, so why must the true God create such a rock at all?!, He is the system Administrator of life, not a sorcerer, conjurer, juggler or clown, but not-a-few humans were ready to ask Him to do such things, also, did Jesus ever ask His Heavenly Father to perform magic tricks?!, of course not, but there were not-a-few people ready to ask Him to do such things, and why must the true God perform magic tricks at all, especially when there are still many that need to be saved(cleansed/healed/recovered/resurrected)?!, therefore Jesus, as well as each of His true disciples presented in the Bible, saved people needing salvation, and didn't perform magic tricks, though they were also impossible for many - so here we proved that Jesus hardly meant quite literally all things that the human imagination could want when He said that all things impossible with men are possible for God
let's take for example another case, e.g. the Jesus' saying: "I am with you every day, even unto the end of time. Amen"(Matthew 28:20, Aramaic Bible), what end of time is He talking about, because He says He will be always with His true disciples until the end of time?!, which means there will be a time when He will be no longer with them, i.e. after the time during which He will be with them every day, the word in other versions of the Bible is "age" in place of "time", and so there is talk of "end of the age", so the matter at hand is some age, a period of time... - so here we proved again that there will be some end even for the true Saints, albeit after (let's say) myriads of consecutive eternities, and this is because there is a transition even for the true God, otherwise, if there wasn't such, there would really be infinitely lasting(endless) life in heaven/paradise for all souls, in the course of the whole time's infinity, but, alas, here is how many souls have already been born and suffered in this world under sin, which is an indication that there is no completely endless life for any soul (just because there cannot be such life - it is just impossible even for God to provide the souls with such life)...
Blessings