Lesson #4 The pebbles in your shoe will take you out of the race…

The expanded version of this lesson is: Large boulders in your path can distract you and cause you to veer from your goal, rocks in your path may trip you up, but (uncorrected) it is the pebbles in your shoe that will take you out of the race. All three can ruin your day, [...]

Lesson #3 Don’t pass the Aid station…

…There is critical nourishment and encouragement there.
In early Marathons, runners ran the entire distance without having aid or water stations along the way. This lead to a lot of casualties. Then a few runners started carrying water. Fewer casualties. Finally, someone got the idea to start having water stations at predetermined distances along the route.
Still, [...]