October 31 of this year marks the five hundredth anniversary of Luther’s posting of the Ninety-Five Theses. It marks a more modest anniversary for me as well: the seventh anniversary of the conclusion of the long walk Andrew and I took in Luther’s footsteps. The idea germinated back in grad school, when one day it dawned on my hiker husband that the great reformer himself had once been a hiker, too. Friars on pilgrimage to Rome were expected to go on foot the whole way (a ferry crossing was apparently the one allowable exception). Luther must’ve been a lot tougher than the portly portraits of his later years suggest...