Life is a long preparation for something that never happens.
This is quite a self explanatory and self sufficient little quote. It stands alone and says everything it needs to say in a nutshell. No one knows the meaning of life. It simply is – something which exists – for its own sake. You make of it whatever you will because in the end, nothing really matters. If you are the sort that wants to believe in some kind of afterlife, that may well be, but that too is after life.
Life, in and of itself, is an isolated unit within your existence.
Life is comprised of the mundane, the exhilarating, the monotonous, the unsustainable, and most importantly in my opinion, the ever changing. It is never one thing, and permutes each day, week, and decade. The person you are now is probably not the person you were ten years ago, twenty years ago, or the person you will be twenty years from now. You can call it development, or numerous other adjectives, but it is always growth. If you are the sum of your experiences, then as time moves on, you acquire more and are in a constant state of growth.
Some believe others regress. It is never regression, but rather flux. You may have bad times, prolonged to what may feel like an eternity, but ultimately these too are experiences. You can learn from them, or simply learn to identify them. In the long run, there are no bad experiences, just opportunities for growth. In the short term, it can feel as if your life is falling apart.
If you want to believe that life is a recurring event, then would it not make the most sense to want to live it to its fullest? Or would you rather repeat monotony ad infinitum?
And that is yet another learning experience. Fulfillment is not always full. Sometimes nothing is fulfilling. Something quiet is fulfilling. Other times you need the unfeasible noise of life for extended periods of time. And by unfeasible I mean temporary. That time in your life where you lived in a way that cannot be kept up indefinitely, that simultaneously pleased and exhausted, and was deteriorated with age, where, looking back, you cannot fathom doing again.
Ultimately, life is what it is, and it is. It came from nothing, and prepares you for nothing. Make of it what you will.