Have you seen Woody Allen's Crimes and Misdemeanors?  Made in the Eighties, it's portrays a opthamologist who, late in his career, has an affair with another woman and, one day, this woman threatens to tell his wife.
     Alarmed beyond measure, the doctor becomes so desperate that he summons his brother, a man who has spent his life on the other side of the law, for advice.  When his brother mentions that this woman "can be gotten rid of," the doctor is aghast.  "How could we?"  he asks.
     A few nights later, however, he relents and tells his brother to go ahead with it.  I won't tell you how the story works out, but I share this much to make a few points about the way the doctor saw the world.  As he wrestles with his dilemma, he asks a rabbi (he is Jewish) friend of his for advice.
     You and I see the universe in very different ways, the rabbi replies.  You see it as cold, heartless, and indifferent, and I see it as pervaded with a moral structure, an unbending moral code.  Indeed, he adds, "I couldn't go on if I didn't believe that at the heart of the universe there is love and forgiveness."
     If you ever watch the movie, however, you will see how the doctor's worldview breaks down, badly.  On the one hand, he insists that the universe is without heart or meaning; but on the other hand, he insists with equal fervor that, at least initially, killing his mistress is absolutely wrong.  But in a meaningless world, how can he really make a moral judgment?  It's impossible.
     As the rabbi notes, morality can only exist if there is moral structure.  And there can only be moral structure if we have meaning.  For if we or the world have no reason to be here, nothing else does, either.