I have previously written on the subject of the subjectivity of human existence. In short, we exist from moment to moment as subjective creatures who experience the world in ways dictated by our previous experiences. In spite of the pure subjectivity of our lives, however, believers enjoy invoking the “if the universe has no higher meaning, our lives are completely meaningless” cliché. Needless to say, I disagree with this notion. Our lives have exactly as much meaning as we believe they do—no more, no less. Given current scientific models of the universe, we are left with the conclusion that our universe is finite; one day, it will either cease existing or be reduced to absolute uniformity (ultimate entropy). Does this fact remove all joy and sorrow from our lives? Of course not. We do not experience reality as objective beliefs. Only our experiences matter.
We have no innate purpose. Some believers find this idea terrifying, but it needn’t be. To me, it is sublime liberation. The knowledge that I forge my own meaning gives me the strength to appreciate my interests at a higher level; instead of being merely a distraction from my predestined end, these activities bring me fulfillment. That’s pretty darn nifty, if I do say so myself. (Which I do.)
Here’s some recommended reading for anyone not terribly familiar with this way of thinking.