Many years ago I had the privilege of delivering a lecture on the life and ministry of John Calvin in the unlikely context of the Interfaith Seminar of the Catholic Archdiocese of Trento in northern Italy. A lone Reformed voice speaking to a room filled with priests and monks at the historic epicenter of the Catholic Reformation, I may not have been the exact modern equivalent of Leonidas at Thermopylae but I enjoyed being heavily outnumbered nonetheless.