As a runner, I expected to enjoy “Run Or Die,” the autobiography of the great Catalan endurance athlete Kilian Jornet. What surprised me, though, were not the details of his training or racing but his lyrical turn of phrase. Remember this line from “Great Expectations”? “Imagine one selected day struck out of it [any life], and think how different its course would have been. …” etc. Here’s Jornet: “A day comes in life when you have to decide which train to take, and once you are aboard, there is no point in thinking what might have happened if you had caught a different one. … We can never know what the other trains have to offer, even though we lie awake many a night dreaming that they are better. ” Words to run and live by.