“For there must be also heresies: that they also, who are approved, may be made manifest among you” (1 Corinthians 11:19). St. Thomas defines heresy as “a species of infidelity in men who, having professed the faith of Christ, corrupt its dogmas.” God allows His faithful to be exposed to heresy in order to test their Faith, their docility, and obedience to Catholic authority. At Baptism we receive the theological virtue of Faith, which is a supernatural light for our intellect, which ...