As you age so mortality touches you that little bit harder. In the Western world, unless you are unlucky, your youthful brushes with mortality are as that oldest generation to which your grandparents belong begins to pass away. By the time you are late middle age the brushes are getting wider and you might even have played with it yourself. You begin lose friends of your own age. Now the Who's song of our generation doesn't seem so fine.
I wished I were religious but I'm not. I can only hope when I go that someone will say that I made their life a little bit happier at sometime. So to an old friend, 'Tim, you made my life a little happier.'