Meaning of Life -- Part 1 of a Million?

What the heck does that even mean?

I'm in my latter 20s and the stuff of life has undoubtedly changed. The things you focus on had changed and the things that you've derived joy from had changed. Thinking about this a little more concretely, this is bound to be true, and is (or at least feels) natural.

Consider life as a baby. Your attention was on something else--as well as what made you happy. Your sole focus was learning to survive: how to acquire food, how to move around, how to stay warm, etc, and though you love the water now, there was a time when you were terrified of getting wet in a pool. That is a much different reality than when you started middle-school, which in turn is a much different reality than when you became responsible for your own taxes.

The point in me bringing this up is that I think its important, once you become mentally capable to, to reflect on sourcing meaning from life. Douglas Adam's Hitchiker's Guide to the Galaxy offers the idea that the answer to this question is pointless. There's no answer (other than "42" of course).

I'll start by examining what does one mean, or what do I mean when I ask what is the meaning of life? Well, if something has meaning then something has understand-ability. And if something has understand-ability, then something should or could be acted upon. So, to me, life needs meaning to be worth living.

Additionally, I don't think that life's meaning depends on one's being happy. One can be living life sacrificially for example and their life can be very meaningful.

I think Douglas Adam's point holds water. There might not be an answer to this question and the meaning of one's life is mercurial (though probably not pointless).