" Yet again, if the fixed nature of matter prevents it from being always, and in all its dispositions, equally agreeable even to a single soul, much less is it possible for the matter of the universe at any moment to be distributed so that it is equally convenient and pleasurable to each member of a society. If a man traveling in one direction is having a journey down hill, a man going in the opposite direction must be going up hill. If even a pebble lies where I want it to lie, it cannot, except by a coincidence, be where you want it to lie. And this is very far from being an evil: on the contrary, it furnishes occasion for all those acts of courtesy, respect, and unselfishness by which love and good humor and modesty express themselves. But it certainly leaves the way open to a great evil, that of competition and hostility. "

― C.S. Lewis , The Problem of Pain