Muggleborn: There are many places where such ignorance of us is occurring right now. Mongolia, for example, or Romania. Anywhere where neither of us has ever been. They have never heard of us. As far as they are consciously aware, we might as well never have existed, and they certainly don't spend any time worrying about that fact. In fact, its impossible for every person in the world to have heard of you, no matter who you are. Is your life less meaningful because you will never be known by everyone who might have known of you? It doesn't bother me, because I've accepted that impossibility, and you probably have too, even if you have never consciously thought about it before. And if you can't expect even people who exist right now to know of and remember you, how can you justify expecting that of people not even born yet? That's not really fair.

But then, anxiety over death as the end of what we've come to think as the "true" us-consciousness- is very powerful. How can we handle that? We can do what you've done-believe things in the hopes that those beliefs will exempt us from the cycle of life and death-or we can humbly accept our place in the natural order, which is what the stoics recommended (I highly recommend that you read the Meditations by Marcus Aurelius if you haven't already). The more humility we partake of, the less our egos will drive us to do and believe irrational things in futile efforts to escape the inevitable, and we can focus on doing the best we can with what we have. We can ease up on the guilt over mistakes and missed opportunities when we realize that no one is keeping score or planning to confront us with the tally. That guilt is just a distraction that saps our ability to learn and do better in the future.

Lessen the guilt and anxiety, and the need to believe in gods, saviors, resurrections, afterlives, and spirit worlds will go, too.

Hume,
That's true. But meaningful for the "here and now" is only temporary. Have you ever done something really embarrassing, early in life that most people have forgotten about? Or from the other perspective, forgotten about something that someone else has done ... perhaps only recollected a vague memory, but didn't know the details ... and in any case, didn't care anymore?
This is what our entire lives on earth become, once new generations are born and old generations pass on; vague memories.

I apologize ahead of time, if you're not acquainted with your family tree, but you most likely remember (or know) your grandfather's/grandmother's name, right? You may remember your great grandfather's/grandmother's name. But beyond that, the family tree is lost for most people. They may not even have a photo of anyone 3 generations back ... forget about anything beyond that.

This will happen to you and me. You're great great grandchildren may never know who you were beyond their digital-family-tree school project, with an mpeg of you if they're lucky.
All generations will pass, and eventually no one will even be left to say they don't care anymore.

So living for the "here and now" is irrelevant, because those moments of embarrassment will be forgotten. Our legacies our ultimately worthless.

So what's the good part? There is a God (I look at everything and know in my heart it had a beginning). He loves us, and He will NEVER forget us. Those that choose God will know the joy of God's love for us forever ... no legacy needed. That's something we leave behind.
Those that don't choose God will have nowhere else to go ... but Hell. Hell is eternal separation from God. They will be eternal, themselves ... because like it or not ... God made US (our souls) to last, but they will wish their existence will end.

In the end ... all it comes down to is a simple choice, Jesus as Lord and Savior ... or not.

I want you to choose Jesus, Hume. I would like to get a chance to meet you someday, know your real name, and share mine ... and share the same joy and new life I know now that I will have in God's Kingdom.

Muggleborn: What if Christianity is wrong, and there is no possibility of "salvation" for anyone? There would be no need for morality to be "meaningful in the everlasting sense," right?

Hume,

Focusing one’s life on “virtue” alone is not really the point. It’s about bending one’s life solely to God’s will. Virtuous qualities are inherent in that dedication. And they are static and unchanging.

Virtue, morality, ethics, etc., without God are meaningless within an everlasting scope, because they’re defined by the individual, or at best, some notion of a zeitgeist, which is really just a temporal common denominator of majority rule, and NOT always globally prevalent.

Trying to practice morality without God is like turning up your car stereo to fix that clunking noise in your engine. Everything may seem well and good, but you’ll never make it up that long road to salvation.

Interestingly, the Stoics were naturalists who didn't really care whether there were gods or not (but they did think that the stars were gods).

This attitude of humble endurance by focusing on virtue originated in 300 B.C. with Greco-Roman stoicism; you can thank Zeno of Citium for it, not Francois Fenelon.