And if this is how things have come about, then we are here to live however long we do, enjoy our life, then die? That's a really good rationalization for people who don't want the restrictions that they feel God places on our lives if we live for Him. This way you can do whatever you want and you don't have to answer to anybody. As for the Jewish concept, jgnat, do you honestly think that after you die you are going to care whether or not you are "living on" in someone else's memory? Or that your wonderful children are carrying on your legacy? Will it help you sleep better in your grave? Not so much tossing and turning perhaps?
It's not that I need God to make my life have meaning, it's just that that is what makes the most sense to me. Please give me reasons (note the plural) for things that you will do in your lifetime that will actually matter once you're dead. Now it's easy to say that such-and-such will mean something to you while you are alive, but when you're no longer alive? Unless of course you argue that after our time here, that is all there is, there is no "after-life" in any way, shape, or form. Then again, that circles back to the question I've been asking. Sure, you generated some kind of meaning in your life by using your great reasoning abilities and you had an absolute blast for all those years you were alive. So what? Let's go ask a corpse if they're satisfied with everything they accomplished in life.
-Sounds like something I would say, 15 - 20 years ago. The Watchtower uses this kind of reasoning all the time: "If this is all there is, where's the point in that? What bigger meaning is there in that? Wouldn't you rather believe you'll live on in warm, furry fuzzyland, skipping about with penguins and lions?" While this is a line of reasoning that is appealing and may seem logical at first, it has no bearing on reality. What I mean is that if reality is that we have come to be with no 'help' from any kind of deity, and there's no afterlife, then that's all reality is. We can say that it's unfair, lacking meaning, not being... 'cozy enough' for our liking... It doesn't matter - not being happy with it won't change reality. It is what it is. Wishing it were otherwise is not an argument.
There are quite a few things I can do in this lifetime that will be beneficial to people who live after me, but of course nothing I do now will mean anything to me personally once I'm dead; that goes without saying, and is only an 'argument' appealing to emotion. I may want a longer/eternal life (I actually do), but then again I may want a million dollars. Reality is I'm very unlikely to ever get my hands on a million dollars. "What about all the things I could buy with that million? Is this all there is? Are you saying I can't buy anything beyond what I can currently afford? No! I refuse to accept it!" Well - refusing to accept it wouldn't put money on my bank account, unfortunately.
As for other points, first you may want to gaze slightly upward to the topic heading of this thread, which says "I've yet to meet a JW who can explain this". This is predominantly an ex-JW forum, and many of the replies and questions here are posed with that in mind, and for active JWs to read (they sometimes lurk and even register), or others who have been JWs or are thinking of becoming JWs. That's why many arguments will have a JW slant to them when it comes to the Bible.
Don't let that fool you into thinking people here haven't researched the Bible, though. I dare say the process of exiting the Witnesses often include quite an extensive Bible study for most, although that study may not always be along the lines of apologetics.
God is omniscient, that means He knows what we are going to do before we do it. That doesn't mean that He's making us do those things (a lot of people make that assumption and therefore assume that there is no free-will, and that if there is no free-will then God isn't what the Bible says He is). It just means that He knows what's going to happen.
If God knows what will happen thousands of years in advance (hence prophecy), that means our actions are predestined. And since we're not the ones predestining them (we don't have that kind of power), someone else would be the one... Who might that be?
Not that I believe God is doing it; this is not an attack on God, but the concept of (a certain) God.
As for meaning and purpose and ethics in life without God, there have been many discussions on this forums along those lines. I propose that while we read the Bible, you should read those threads.