This is one of the reasons I left Christianity for Buddhism. I came to realize that heaven and salvation wasn't my main goal ... cessation of discontentment and suffering was my true goal instead.
Some believe that achieving heaven and salvation will give them cessation of discontentment and suffering. For others, the idea of eternal life causes them to experience suffering & they seek annihilation instead. Either way, the more fundamental goal for both seems to be the search for cessation of discontentment and suffering.
You know that's all good and fine, and well and good, and we should "try" to do that in this world while we are here, but, it's not gonna happen without "The God"... He tells us the truth, about things we don't easily understand or comprehend, like suffering, and that in this world you will have trouble and trials and tribulations, but not to lose heart, ect, and have courage in and when dealing with them, even running out to meet them, ect...
To "glory" and rejoice in them, revel in them ect... And why...?, because we (will) have a much closer and much deeper fellowship with Him is we are sharers in His sufferings, which are really all of our sufferings and things we go through, ect...
You can't change this world or man, because the underlying problem is with man, or this fallen existence, without having a or the very personal God who desires to get very personal with us; "who is a God who suffers, and suffered", more than most of us know... Who came as a "suffering servant".... But for the few that do know or might know, even in part, can you not tell me how much more closer that brings you to Him, for the few that might or do...
We have a God who suffers and/or suffered, and had emotions and feelings, a very personal, but yet very high God, and if we get some kind of sort of or any kind of clue understanding that, or bridging that gap, (how High or Great God is compared to us) (distant, ect) through our own sufferings, it gives us insight into Him, and creates greater closeness, to where you should have fellowship with Him...
You gonna tell me there is no other world besides this one, and this reality is the only reality, and there is no such thing as higher beings, in "all of this" (everything)...?
You gonna tell me "all of this" did not have a source...?
That there are no other (higher) beings or intelligence's out there, or here with us right now...?
Seeking the Kingdom of God (Heaven) is seeking God, and "The God" of everything, and there is nothing wrong with that...
God Bless!