By Charles J. Chaput, First Things - Joseph Ratzinger, better known as Pope Benedict XVI, stepped down from the papal ministry in 2013. But before he did, he began drafting an encyclical on the nature of Christian faith. His goal was to finish his ongoing thoughts on the three theological virtues—faith, hope, and charity—and their implications for true human development. For Benedict, faith was the foundation and informing energy of the other two virtues. And to his great credit, a newly elected Pope Francis adopted Benedict’s draft upon his accession.