" The Church, in her human dimension, will always be battling sin; there will be schisms, scandals, abuses of power until the fullness of time, in the hierarchy, and among the laity. But the divine dimension of the Church, and her fortification by the Holy Spirit, ensures that she won't be overthrown. When Christ gave St. Peter the keys to the kingdom of heaven in Matthew 16, naming him as the foundation of the Church, he also promised that the gates of hell shall not prevail against it. Human sin won't win. "

― , Into the Deep: An Unlikely Catholic Conversion