Ah yes, but i think the whole point is, is that question even relevant?
You have to much living to do to worry about this question. Life is too short to spend it on some quest for unattainable concepts.
You have two basic answers, life has a meaning, or it doesn't. Whatever the answer your life is the same. If it has a meaning then you obviously don't need to know it to fulfill it, if it doesn't then you just want to enjoy the experience of being alive while you can.
I think at some level we find it difficult to let go of the idea of finding meaning, but honestly it's just not important, find what is meaningful for you and then enjoy that, everything else is just details, that may be answered someday, that may not. Still not important.
We don't know what happened before this, we don't truly (out right certainly) know what will happen after, but do we need to know how a watch works to tell the time? If nature can fulfill it's purpose be simply being and we are a part of nature then why are we to be different? We fulfill our purpose by being alive, whatever the purpose ultimately is, we all have to much living to do, to spend our time figuring out how this watch works. It's true meaning perhaps will become clear to all when the last breath is taken or perhaps not, such is the dilemma of the human race.
"Don't ask yourself what the world needs; ask yourself what makes you come alive. And then go and do that. Because what the world needs is people who have come alive." - Harold Whitman
"People say that what we’re all seeking is a meaning for life.... I think what we’re really seeking is an experience of being alive, so that our life experiences on the purely physical plane will have resonance within our innermost being and reality, so that we can actually feel the rapture of being alive."