Life is cruel. Not because of pain or loss or any of those typical reasons - life is cruel because this universe is so unutterably vast, and so many people will see so very little of it. Even if nothing new was made after today, there'd be so much more in the world than you could ever experience in a normal lifetime.

Of course, I'm a Singularitarian, so I'm optimistic that my life is going to be a hell of a lot longer than one puny century